Steve, I specialise in TP shutter restoration, they are the only good option - Packard shutters have little speed control in comparison (I do have some).

I understand your dilemna but when these shutters were at their peak film speeds were low. There were higher speed TP shutters they are in the catalogues but I've never seen one so far, I could make one though from a regular TP shutter as it's just the slit width that differs.

Using old equipment you have to work to the original constraints, and they got the best out of what was available back then

Ian