I just ordered speedbleeders for both of my XBs. The stock calipers use an M8 x 1.25, the Brembo for the swap uses an M10 x 1.00.
they cost $7 each, only sold in matching pairs...so I'll have an extra one of each. Anyone that's done the swap want em? $15 shipped to you. The cheapest you could do this normally would be about $30 because of having to buy them in pairs.
shoot me a PM if interetsed.