Plans are a go, spent a few hours going over all the RPO codes, I have the 3.05 (F83) M15 (245mm TC). Intense confirmed that all Lacrosse's either came with 3.05 or 2.86 gearsets using the 1:1 drive chain, however the 2.86 diff isn't available on the 2009.

Diff is $100, Tune with shipping more than likely around $450-$500