XRAY - Model racing cars

Hi all

Back my new car's first race this weekend. I was running my freshly built '19 - first new xray since my '17 which had served me well and was a peach to drive.

My first day with the '19 was an absolute disaster, possibly my worst race of the past 20 years. The car was desperately loose, mostly in the sweeper entry and in the chicane, but unconfortable everywhere, really.

Layout was tight and technical, except the sweeper (which was not smooth but more of a abrupt entry one, and then smooth). Lo-grip carpet. We run Rex30's and boosted 13.5's. My car was setup as per the stock setup sheet, except the aluminium extra-flex chassis, and 2.5-2.8F. Montech Racer snug with the front bumper. The rest, all stock. Electronics from the previous race, where they did better than fine. I could not get the car to behave, I never found a way to be confortable with the car and "pilot" it, and could only drive very conservatively. Heck, did spin out a couple of times in the sweeper...

Things I've done during the race to no avail, in that order
- tried another set of tires
- go to 2.7F/2.5R
- go from 450R to 350R
- removed the front brace
- toyed around with screws on motor mount
- swapped the alloy chassis to cwf one (yes... I did that during raceday and missed a couple of mains)
- go 5K diff
- heck, even changed motors and speedo setup

Checks I did during the race
- check that I hadn't swapped L/R C-hubs (for cast