Looking at that picture from Fettered (thanks) and once again holding the real pieces together and I'm still in doubt about it (I know Sidewinder, I know). I just cannot replicate the angles and dimensions in the pictures using the pulley front half.
Glad the dot thing is cleared up for me. The thing is the the definition on that photo is really quite good and I just feel that looking at it I should be able to identify the pulley front half without any doubt. Anyway, whatever, I just feel it maybe too small.
This picture will really help me when I build the scope mountings. It's awesome.