These tryes were also tried by a few drivers at Round 2 of the CML Winter Series that is held at Frankley a all astro track and seemed to work very well
The drivers used them as they were with no cutting of the rows and come as non pre mounted or pre mounted ready to use;
http://www.gbmodelsport.co.uk/produc...artNo=D8SPXSMC
You can order theses through any of the dealers which tells you on the contact us part who the dealers are
Hope this helps you