I've already installed Callaham bridges in my Powerhouse Strat & Squier '51/Strat Parts-O-Caster conversion. I'm a huge fan of Bill's products. I won't own a Strat guitar without one!

I'm having 2 made for my American Deluxe models right now. The difference in tone & sustain is night & day from the stock crapola that Fender dishes out. I may lose the cool pop-in arm, but the sound greatly outweights the pop-in arm benefits.

I'm very suprised Fender doesn't install high quality tremolo blocks in their american or american deluxe series guitars. If you are dishing out $1,000+ USD for a guitar, you would expect to have the best, right?