|I see where you're getting at.
After 5 years of this kind of frame I think I'm confident with them, though.
The charm with ski baseplates, however, is that you must drill holes, which makes the plate more vulnerable, and that you only have this many holes to go until you ride a swiss cheese plate which is handy for lunchbreaks, but not for skating.
Oh yeah, I totally forgot to mention I'll mount my sliders using angle brackets. I'll explain further later on.