Finally got the AWD Mountain Pass Performance Partybox installed in my Performance Model 3. Tried it out at a local go-kart track (Adams in Riverside, CA.) Alternated between Track Mode and Partybox every other session to compare. Times were similar, but slightly better with the Partybox (about four-tenths of a second on a sub-50 second track.) I find the car feels more natural with the Partybox than in Track Mode. I wish I could access the TM data while using Partybox though. I am looking forward to getting out on a big track to try it out.