Knowing that most probably you will be using these tyres at our local track at Pembroke
I suggest you stick either take-off cs22s or Sorex 28r or even 24r if you have loads of cash to burn
These are the only tyres that will work if you are after top performance. CS 22s will give u 3 good runs in a row with very constant lap times. Sorex 28r's will give you a blinding first run and then start to taper off as regards to grip.
I have tried out numerous tyre combinations including HPI tyres and Inserts but nothing will perform as well as the tyres mentioned above. If you need any help feel free to contact me via email or pm me on this thread.
Bye for now hope to see you at the track....Gustav