Walter Broes
Enlightened Member
The flat screws actually do turn a Melita into a normal, playable bridge. For a short while, the reissue Gretsch Melita style bridges came with two sets of screws - one set of traditional useless thumbscrews and one set of the flat ones.There may be flat-head screws available for the saddle adjustment instead of the thumb screws.
Embiematic bridge
I have no experience with them.