my reasoniing was because the fighters in the second shot are coming 'towards you' the wipe should too. I'll play with it and see.
motionpefrect was fine for the second shot, but the big pass it really screwed the pooch, even when I fed it a 150fps file, if I used motionperfect on it s own, there was loads of digital smearing etc. I had to use script to revert the framerate back afterwards.
*update*
played with it and yes the iris in works much better so I've reversed that. it follows the direction of the first group and is easier on the eye.
further update, last night, redid all the space shots so stars are more visible than before. tweaked the existing technique so stars are now 'stars'