After many years vac-bagging and avoiding infusion I was tempted to try it after some gentle persuasion.  Freakin' awesome!  Not hard and great results.  Yay!

However, I recently made a booboo.  Infusing a 1.2m x 0.2m part; 4x200g with 6x200g in places; peel ply, mesh, bag.  I opened the inlet clamp and it seemed to stick.  A little jiggle and the resin shot through, not all the way but a good chunk was done in about 20 sec.  Bugger!  Let it flow at a more sensible rate to finish up.  I let a little more flow in on completion but as expected its pinhole-tastic on the fast bit.  Is there any contingency for things like this, ie should I have let more resin flow through or is it a once the damage is done thats it?

If there's a fix it would be good to have a list of problems and solutions.

I have really never had a problem with infusing fast. I infused a 1sqm bonnet the other day in under 30 seconds, no pin holes. I guess it probably varies depending on resin and infusion mesh, though I would be tempted to say your issue is probably more from slowing it down again. If it infuses fast then let it, just let a touch more resin in at the end. If you are calculating the resin requirements correctly then you know the part won't be resin rich anyway. By slowing it down, you increase the effect of the vacuum on the flow front, causing any air in the resin to expand and when it gets trapped you get voids.