Yep (used to use that combo)
Yes and vice versa.
Yes it does, it will need the gasket fitting as hitch don't do that as standard. Both the lee and hitech filter holders suit 2mm filters. Both the lee big/little stopper and hitech fire rests are 2mm.
They should do but I had one that came without a gasket, a quick email to hitech and one was in the post to me. This was before hitech brought out the fir rest holder with built in gasket but I'm sure they would do the same as they know their filters are used with Lee holders.Rob thank you, do you mean the gasket comes with it and I have to fit or there is no gasket and I have to get one