Everything has been coming together beautifully for you...
FWIW, your plan is good on the A/C stuff, but you should also know that there is always a "wait and see" aspect to rebuilding an A/C system. SPX Corp. (Robinair,OTC,Kent Moore, Miller) makes adapters to pressure test the individual components, but the temperatures the system cycles through aren't duplicated and extremely small leaks can cause a system to discharge regularly.
My guess is that your shop will want to add a leak detection dye when recharging, and I would suggest that you try to operate the system through several thermal cycles before any heroic reassembly of interior components. Cars that would leak down in just a day or two, might only leak significantly when the evaporator has been brought to freezing and metal has contracted, and then the engine turned off so that higher pressure equalizes into that component. That kind of factor has always made small leak detection a challenge and airflow and moisture will give false readings on an electronic leak detector, which leaves lots of room for debate as to which component may be at fault. At least with the dye, there should be some evidence after the fact, even if you get stuck having to remove a component again to find/prove it is at fault.
The bigger issue as that the components are clean, so your rebuilt heat exchangers are wonderful and with a good compressor and hoses, there should be little risk of contamination which could cause compressor damage or clog a TXV.
Thank you for documenting everything so well here, these are always the best threads.