So I am trying to get my Foxbody swap all ready for the infamous "first start", but ive already run into hptuner issues. The car has a turbo 4.8, 80e, ls9 map sensor, drive by cable, and a 411 pcm (from 2001 Sierra) which has the 12208322 OS. Ive read that the OS will not support 3bar, so which OS should I go with? I would like to have RTT too if possible?