The spacebar is possible, but very hard to maneuver in a way to take out the wire. It's possible, but not practical. Just desolder the switch, that's the easiest and fastest way.
HOWEVER, this isn't the real problem. Having a "universal" bottom row to support both 6.25x and 7x spacebars and the corresponding modifiers won't work because the cut outs will overlap on the plate. If you want a universal design like this, you have to use PCB-mounted stabilizers. Phantom does not have holes in the PCB for PCB-mounted cherry stabilizers, so this won't be possible. This is why for my universal plate design for GH60, the only stabilizer choice is PCB-mouted cherries.