Ok so here are my latest findings. The new BTCC cars , ie VW Passat, Honda, MG and BMW 125 with just PGs on the back are great, at best a tiny bit of weight near the guide to help,with the grip from the PGs, ser fun series.
The classics like the RS and the E3 etc although narrower are no different. A bit of chassis weight with PG tires and they are just great little runners. The tires that come stock onnthe Current BTCC are the new style and pretty grippy as it is. But thenolder version even though newly produced do need some PGTires . Think,of the Old Clark Lotus Cortina and then add a few ounces of fun withnthe RS and the E3 Beemer.
If the tin tops are not your thing , then dont waste your money as you wont like them based on the looks alone, but if you like the cars that look like street cars , give them a try. Dont expect Gt speeds and performance , but be prepared to ditch the magnet and do som e old style tail hanging racing.
That has been my experience . To add to,the sets you can run some of the Barhurst cars which are the same but different liveries.
The future is in our hands, choose wisely