Used them at the strip and on the street for years, love ‘em.
I always ran them 1/4 turn of preload and they worked great, but rode stiff.
I then read an article on setting them properly and the thought was no preload was better, actually adjust them to about the thickness of a dime from contact. I did this and they work as good, and ride is like factory. I forget where I read it, maybe on the bullet.
(Keep in mind when setting them you or weight equal to you should be in the driver seat).
There is really no equal to CalTracs, my car would hook in wet grass with them I think. Worth every penny of the cost.
As for the wrenches, I bought a cheap box/open wrench, cut it in half, then cut the box open (like a tubing wrench). Works great, and cheap. Whe I bought mine I don’t think Calvert had the wrenches. Plus they don’t need to be anything special.