Neuro, how well does the rrs focus rail hold up with your Frankenstein?
I just got the 100L yesterday and am now looking into getting two Winmberley F2's for my 600 and 550. Alll to be used on a 5D3. With the 2 larger flashguns it will approach the weight of your setup. With all the weight, will the rrs rail still work smoothly? Do you connect the Wimberley's to your lens plate? (Rrs or wimberley?) Is it also possible to connect the F2's to the bottom of the rrs rail (so that they do not move during focus stacking)? In that way considerably less weight needs to be moved by the rail.
5D3, 16-35LII, 24-70 2.8LII, 24-105L, 85LII, 70-200 2.8LII, 100L, 135L, 100-400L, 50 1.4, 40 2.8, Sigma 180 3.5 EX, 1.4x TC III, 600EX, 550EX