Having said that, give Paul
@ Paul Gage tires a try..........Just Google him and you'll find him.
His tires (Urethane) come in several compounds and he is VERY helpful to aid you in your choices.
Currently I'm prepping a couple cars for the CanAm Proxy and their both running on the "extra-soft" compound and they stick like glue on my N-digital track....
Just my 2cents..