Useful for mandolins...?

[FA Jaén]

Perhaps you find this useful for some mandolins:

http://www.guitarrasjaen.com/double-...ridge/?lang=en

[George R. Lane]

You might want to look at Vern Brekke's design. It has been around for several years.

http://bridgerproducts.com/brekke_bridges

[FA Jaén]

Reinventing the wheel... Not the same because that Brekke doesn't keep the wedges in full contact all the time (being straight, it is not possible), but that doesn't matter a lot, even less given the simpler design. Forget about it!

[Marty Jacobson]

The maker references the D'aquisto wedge bridge as inspiration for the design.