Perfect in every way....
I'm using it to hold a Raspberry Pi computer, a 7 port USB power hub and a 10 Amp power supply on top of my 72 mm Apo. It fit the scope's rings perfectly and provides enough weight with the other gear to balance my two cameras and OAG at the back end. As always, or nearly always, OPT had it in stock and in the mail the day I ordered it, and I live close enough that it arrives within a day or two. Could not be happier!