This is a very solid mounting for my VIxen VMC260 on a SB MX Paramount. Much more stable than the standard vixen dovetail mount that came with the OTA, which also required an additional D style conversion. I was so impressed, I ordered a second to use on the top of the OTA for mounting a decent sized guide scope using Farpoint D style adapters. Only complaint I have is the 5mm socket head screws provided were 10mm to short to engage with the PEM fasteners inside the OTA, but other then that, well machined and solid!

Great fitting and well machined plate, but the little black screws provided aren't the right size--you need to get M8/80 / 25mm screws.