So I started the build over the weekend. Comments and issues as follows.
If running internal di2 cables, recommend an internal cable routing kit. I have ZTTO version from Aliexpress.
Disc brake cables were able to be routed without internal cable routing kit so if using wireless SRAM should be OK without internal routing kit.
I had to drill out aluminium cable boss for front derailleur (IMG_7361,7363,7365). As mentioned previously, it was set up for a traditional cable with internal cable housing. I'm running di2 so needed a larger diameter hole. I used a 5mm metal drill bit and hole will be plugged with di2 grommet. Then I found out the front di2 cable I ordered is too short so need to order another to fit front derailluer

When mounting the rear disc brake, the bolt holes were not entirely neat (slightly oval shaped) so had to use a 5mm wood drill bit to gently clear out a bit of carbon to get caliper bolt through the frame. (IMG_7366)
Biggest issue so far was the supplied d-shaped compression plug. The supplied plug does not have a threaded insert to accept a bolt to screw the stem top cap down. There was also no screw for the top cap supplied. I have contacted Airwolf and they have said there is a problem and will send me a new one. (IMG_7367,7368) Not an issue, see post below.
So my build is part completed pending
a new compression plug from Airwolf and a longer front di2 cable.