I'm in a similar situation. My plan was to see whether the guys in Santa Clara can do the coding -- then in phone/BT showed up on my head unit, I'd feel confident that the wiring piece could be sorted.
Euro spec wide angle mirrors; Dinan front sway bar; sport wheel + flappy paddles; staggered sport rims with Conti ExtremeContact DW. JL Audio 600/6 + technic harness; Gladen Audio 8" Woofers + musicarnw adapters; Morel Hybrid Ovations. Project pile: 2 sets of rims, more staggered and less; M3 flappy paddles; Msport factory suspension: front & rear sways, springs, & struts.