Randy Richard's post on YouTube inspired me to go further, making even lower profile clamps for not only just being able to clamp ridiculously thin stock to the bed but in addition to that, totally disappear into the T-slot when not needed. They are so low, they can be pushed to the other side of the table, under the vise when you're desperate enough. The clamped stock shown is 3mm plate which is probably less than practical.
While my modification of Randy's version is not to his level of detail, with my method, there's no need for slotting the toggles as the pins allow the clamping bolts to swivel to the clamping angle.
My dimensions are for the Bridgeport table and will of course have to be adapted for different slot dimensions. Bolt lengths are to be decided upon in practice and cut to optimum lengths.
My sincere apologies if this was already done before as I've never seen it anywhere before and was to me, an original idea in my small world of reference.
So please don't post if it already exists.
Great fun to all of you who happens to find it useful!!
Low profile clamp.PDF