Proline 2 stage foam inserts 1/10 buggy
 

Anyone running the Proline 2 stage foam inserts PL1684 in their 1/10th buggy? if so why and with what results?

I tried fitting some to Schumacher yellow mini pin rears and the tyre does fill out in a much more regular shape than with standard foams and seemed OK on indoors carpet.

Looking on the Proline site it doesn't really give any useful information about why they were developed etc.