Tom, the lock bolt heads on the Schroyer are pretty cool. Like the "fancy" flat top heads you see in catalogs. Only these are wider. As for the bits, I'm just to lazy to go buy a little bigger one.
Guy, I agree with you on bench copies. Not to copy one closely and get all the nuances seems a waste of the opportunity. The only reason the T.G. ,for example , is not exact, is the expense of making a model and casting a single piece when you've got one that's correct on hand.
Allen Martin did an exceptional bench copy Henry Mauger where he copied one and added the carving from another.