This is where SD Mental illness comes from.   Hope fully thing move forward from now on 

Im so sorry - I have no advice to give about this, as we were not involved much with court cases - just a few things were filed mostly for money.

Sad that SD is at the center of this chit storm and cant live a happy normal life...

First, it is extremely rare to leave one of these types of actions without being skeeved out and feeling like you need a high pressure scalding shower to get the nasty off of you.  Even when you are the quality side of the equation and have won.

We never had custody evaluations. We did have to defend a change of custody attempt by the shallow and polluted end of my Skid's gene pool.   Our model was always to provide anything and everything requested by the courts and go with every assbaring fact, document, and witness immaginable to skin the opposition alive in court and on the public record.  They would come in with nothing more than the Spermidiot's last 2 pay stubs and none of the information demanded by the courts.  We made sure to ask where their information was every other sentence while in court.  "Your honor, we did not receive XYZ information from the (toxic opposition). As you have reviewed, we have provided that information as requested, here is a notarized copy for the opposition in case they failed to review it when it was submitted to them XX weeks ago."

We came to every hearing loaded for bear, we provided the documented facts, we provided support for those facts, we made sure that every toxic molecule of putrid breath they ever spouted was highlighted, rehighlighted, and highlighted again.

We made the point of our efforts the SKid's well being and how the noxious crap in the shallow and polluted end of his genepool/SpermClan was clearly detrimental to the SKid's well being.  

It sounds that the GAL is clear on reality and that you are well prepared to confront the bullshit BM and her cesspool of support will pull out of their asses.  

We never lost. Sadly, even with court support for our position, the SKid was still exposed to their putrid effluent gene pool bullshit.  We made sure that he knew we had his back, that we would work with him on any challenges he would drag home from SpermLand visitations. He knew we would not lie to him. As he progressed through the 16+ years we lived under the CO he was introduced to the facts in an age appropriate manner.  

Ultimately he escaped them when he aged out from under the CO and no longer had to visit per the COd visitation schedule. Even with a long distance visitation schedule to SpermLand they would try to PAS him against his mom and me.  

Stay the course, tolerate no bullshit, bare their asses wholesale with every fact, witness, and PI report you can compile and keep compiling more and more for the entire duration of the SKid's CO years and beyond. Keep the facts in front of the kid to counter BM's manipulations. Be calm, be confident, and be professional in presenting, discussing, and exposing BM's crap to/with the SKid. In an age appropriate manner of course.

People like this BM never stop their crap. Not even when the SKids become SKidults.  The full frontal facts give the SKid the ability to defend themselves against a toxic parent and shallow and polluted end of their gene pool.  

For us, SS learned for reality for himself. He knew the facts, would research heavily when he would return from SpermLand when they would spout some crap that did not pass the smell test. He would sit down with his mom and me to discuss it.  It got to where he would call them on their lies and manipulations in real time when he was on visitation.  It did not end when he aged out from under the CO at 18.  He ended up writing them off completely after they went after him to repay them for the 17+ years of CS that was ordered under the CO when he was less than 1yo.  Their tactic was that he owed that money to his three younger also out of wedlock Spermidiot spawned half sibs by two other baby mamas.  He turned his back on them after 4 years of those manipulation attempts.

Stay the course, bring the facts, destroy the toxic, and give the SKid a chance at an adult life with them as contained as possible.

Good luck.

Shrink4men.com.  You might find some ideas and help there.  

Question:

Does anyone have any experience with custody evaluations?

Answer: 

What I do know is, Custody Evals lack reliability. Because, there is no standard of practice FOR evaluators. That alone is a huge red flag.  

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Here are a few points you may not be aware of.

-Your bf having summer visitation is pretty standard stuff. There are kids on ST that are spending all summers, 1/2 of Christmas, all of spring break with ncp. It's been standard for 25years or more in family court to 'grant' this when ncp asks for visitation. 

-The shenanigans bm is playing with the doctors appointments, stuff she says. etc..is right out of the high conflict bm handbook.  Her gift of pausing child support for

1 1/2 months is her way of showing the court she is co-parenting with bf. 

-If a bm is custodial parent--it is rare custody flips unless she lands in jail with pending felonies. Those felonies usually include child neglect and/or child abuse. 

-Your bf is better off trying to  tip the scales of custody more towards 50 50 equal residential than trying to flip full custody from bm to him. 

I don't know what to tell you.  Your going through courts.   Just make sure all communication with BM is in text or MFW   Nothing by phone or in person.  If BM tells you something in person you immediately text her back with a summary of what she said. 
" this is to comfier that the drop off time is Sunday at 2 pm at X location ".  Make sure you keep all the texts.