You may need to bend the bar into a dog-leg to accommodate the pickup legs, otherwise the pickup height may be too great. It depends on whether your pickups have short or long legs.

The pickup legs themselves are probably 0.5mm thick brass, so the bar doesn't need to be too thick . The pickups mainly sit on the two height-adjustment screws in the middle, so the pickup leg screws are only there to help hold the pickup on to them.

Don't assume that the end of the fretboard is at a perfect 90° to the centreline of the neck. You may need to sand it slightly to get it like that.