General tx16s questions please

[VertexML]

Great work on this. I purchased tx16s and R9 ACCESS module not knowing it wouldn’t works (only ACCST). I come from x-lite with RM lite pro. I use the 4 pins on r9mm for extra camera gimbal servos, and ACCESS in opentx allows me to remap those receiver pin channels and also toggle F.Port.

questions:

I saw in a git threat this code now added opentx mainline. I flashed with accessexternalmod option. Is opentx code latest best to use, or is the patch in this repo better? (Bug fixes)

Does this hardware mod loose any functionally? Like it takes up one of the external UARTS ports?

does telemetry/F.port work as expected? I saw in video demo f.port was enabled in radio UI so assume it works. I never saw example where R9 Access menu shows the pins on receiver you can remap (like using rm9 lite pro module on x-lite)

I notice screen shots for wire from board to
2 pin XJT is different from the you tube video I first found. You tube video shows soldering to one of the 5 solder joints, whilst this git shows solder to a resister pad. Is this just the same board track, or is there some variation in the tx16s internal module? Which is better? I assume one of the 5 pins stronger than risk desoldering resister.

For reference video from Rota35 here: https://youtu.be/33ehE8QtLgQ
Will add screenshot also

[VertexML]

Actually, ignore last question. It looks like same board track from the
Pic only. I will see better when I open radio. If any conflict between your images and video I will ask again. Appreciate help on those other questions before I open hack my beautiful tx16s max! May as well add Bluetooth next!