Thanks all - the TPMS emulator and JB4 are kinda overkill (my ideal price is 'zero'
) but it's good to know the options..
The winter tires are still giving me trouble after 300km on the road. Perhaps these are just low grip for the power being generated at the axle? And since I went down to 225 (from the stock 255) in the rear, that won't help either..