If that is with the capo making EBEABE then the fingering will make ECEC (that bit's easy) but then fretting the B string to make C will put you sort of fingering round the capo? Is that what you mean (off to try it but it sounds tricky).

Jonesy - I have a Third Hand and find it very hard to get correctly and swiftly applied. I prefer the Scott tuning capo (same principle but little lego-like blocks that lock into place) which I modify by adding little rubber pads to the string-facing surfaces. I am trying to figure out the best way to increase the curvature on the bar round which the blocks rotate.