the new vp150 has a threaded allen bolt on the rear already. the fmb screws into it. the tricky part was measurintg where to drill holes and countersink the screws on the top of the EC to mount the bracket to the underside. yes, the bracket angles both left to right and vertically. i first thought $35.00 was a little much, but sure made the job easier, so it was worth it.
dan