Awesome bulid....I had AVCS issues as well in my build 1...and it continued in semi build 2 and into final build 3....
Build 1: Previous workshop hacked my AVCS cam gears and really....found out later they HACKED my build 1 completly.....dodgy as! ( HP...........F)
Build semi 2: New workshop...Build 1 was fixed but AVCS problem continued intermittenly but then lifted my head with E85 ( used oem studs in build 1)
Build 3: Continued with workshop and did a full build from the start...AVCS returned on run in tune.....Replaced everything like you did, intake cams gears, cam sensors, checked timing, checked voltages, cleaned out old OCV solenoids, checked cams.. etc etc and in the end was the OCV solenoids...
Sometimes it would be best to sacrifice AVCS all together and go old skool.....there's nothing wrong with no AVCS........oh well...maybe next time...
As with all these types of builds....$$$$$, patience, and determination with a good workshop...and by going by the photos....its the same workshop I used and still use....and my engine is still going strong til this day....
Also help from Mr. Phil Lowe also helps heaps....
Goodluck and all the best....
Justin
Just checked out your beast on club.lib nice work! very similar to my goals, i was even looking at the ATP Garrets for some more boost!