Foundation Piecing Ruler

I found that the traditional Add-A-Quarter ruler was hard to use, particularly with sore hands. So I designed this one.
The actual printed part has countersink screw holes for attaching the handle, and a quarter inch overhang as per the Add-A-Quarter ruler.
The handle is a simple standard cupboard/drawer handle.
Underneath I have glued some non-stick drawer liner (using Loctite 401)
It works a treat, and my hands do not get sore.

Update: I have added a longer one to the project.