Re: ABM Wilkinson-style hardtail
Well, my ABM Wilkinson style hardtail just arrive from GuitarElectronics.com. Looking over it, it's a finely made bridge. I really like how the saddles lock down. It might be nice if it had channels for the height adjustment screws. On the other hand, the lack of channels gives you the option of making string spread a little wider by fanning out the saddles.
As for the lock-down screws, the answer is "yes, they do protrude from the bridge". However, if you are replacing a standard strat hardtail, and your saddles don't lie flat against the bridge, then this shouldn't be a problem. At worst, you might have to drill 6 tiny holes, no more than 1/8 of an inch deep for the screws to clear the top of the guitar.
Alas, when I tried it out on my Warmoth strat with their narrow spaced hardtail, the 3 scew holes were too close together on the ABM and didn't line up with the holes screwed into the body. They're off by 1 mm, which is awfully close, but would required dowelling and redrilling.
On the other hand, I got this bridge for my next project. If Warmoth won't drill all 3 holes, I'll have them drill the center hole and drill the remaining 2 myself. I'll then replace the saddles with a set of GraphTech Ghost piezo saddles designed for a Wilkinson trem.