AF64 arrived this morning!
First problem was the clamping lever was on the wrong side, it looked like it would interfere with the fins on the mobo heatpipe and be awkward to get at when in place. Unscrewed the retention assembly and re-assembled it 180° now the lever is the correct side, fan is still pointing to the front of the case!
Second problem is the base of the heatsink is dog rough and concave! Scraped all the gunk off and used the edge of a SKY card to see if it was flat, in one direction it's concave and 90° to it it's nearly flat, but the finish is very rough! So either I leave it at that and hope it's OK or try to lap it flat and get a better finish, should I lap it? More damn work