I gotta disagree with you on that Tom.
Because of the way that radial tire cords are wound, the tires do take a "Set".
Not like kart tires, or bias ply racing tires.
There Are advantages to cutting the tires. As already stated, they do not chunk off (for lack of a better term).
They also change the slip angles that the tires work at; there by changing the temp, and grip, that the tires will work best at. (Even on dirt)
Does it add extra costs.................
Sure it does!
The question is.....
How hard are you willing to playing the game?
Is a spot or two worth the added cost? Maybe if it means a win.
I'm just doing it for shear enjoyment these days. I miss being in a race car. I am also enjoying building "My Car" "My Way". Is it the right way?
Only time will tell.
The tire debate is about like the oil debate.
This will go on forever!
Do what you need to do to accomplish your goal. It's not always true that "the guy with the most money wins".
There is room for good ol' fashion engieneering. Lots of younger guys than me, with a whole lot more talent. Still think that the smarter driver and and crew will get the job done!
My .02 for what anyone thinks it's worth.
Steve