Without question the best thing you can do to a 210 to get it working wonderfully on low grip (indoors sports hall for example) is put on a Dimec20 chassis and the cab forward +8mm shell.
I've seen lots of people run we with this - no extra weight needed.
I ran mine for the 1st time on worn pins all round and it was epic.
Totally transforms the car - that's what I'd heard and it's true
