I’ll try to adapt that to my next mandolin project. Looks like the footprint is a little too large as is for a mandolin. Shouldn’t be wider than about 3/8”. What’s the slope for the wedge? 

It's based on Jimmy D'Aquisto's "Accutone" sliding wedge bridge. I can't recall what the slope was but very shallow as you can see with a matching slope on the saddle. I just googled it at the time and built a semblance of it. I've done a few and they work great! I'm sure you could scale it down for a mandola or mandolin but I don't think I've seen anyone do it so take that for what it is. Here's a link to get you started.  2003 D'Aquisto Centura (archtop.com) 

Darrel