Is it possible to get my T-90's modified such that they would have some kind of mirror lockup system? Preferably a manual turn-the-crank kind of thing. If it is possible, is it practical? As much as I would like to see this happen, their are $$limits (within reason) and I would not like to see to many of my currently available functions disappear. Who would do it and where? Naturally Canon is no help since such a modification would not put any $$ into the Canon treasury. I posted this message a couple months ago but had difficulty returning to this site until now. Thanks for any help you can give me!