I've got a set of Rides (as far as I know, all compounds) on the way, so should be able to test 'em next Sunday (Feb 15). Never really liked the idea of the way the Shimizu's mounted, so I've stayed away from them, although a couple of the other guys I know seem to like them.
Tried the Tamiya rubbers back to back with the B foams on Tuesday night and they were terrible. To be fair, I think they need a bit more heat in them to work well. My best lap dropped from around 23.6 to 27.5, but most of them were 29 or over because I couldn't keep the car from spinning
I had treated them about 45mins beforehand and they felt sticky enough, but no real grip at the back. This is an outdoor asphalt track...
I will have a set of warmers for the next evening meet, so will give that a try.
Spotted these on the hop-ups list for the F104 on the Tamiya web site:
54199 RC F104 Rubber Tires - Rear/Soft
54198 RC F104 Rubber Tires - Front/Hard
No obvious clues as to availability...