Be aware that if your axle is too long it can stick out beyond the DO edge(s) so much that the QR skewer won't be able to contact the dropout or derailleur claw. The nominal axle length for 126mm DO spacing is 137mm. You may have to re-position the bearing races to accommodate either a claw or an integral RD hanger. If you're going to be shifting spacers from left to right anyway this is the time to get this right.

Or maybe you knew this already, in which case you can just ignore this note.