Definitely a handy solution for smaller box/frame parts.
I also hate tilting my blade. If you can measure the miter, you can shim the ramp with tape to dial it in.
I do that on miter gauges by corners on to long strips of stable material (masonite) then checking for a 90 when the corners are joined perfectly tight. If you use an accurate square to check the 90, you can use a feeler gauge that is as think as a piece of tape. Slide the feeler along the gap until it stops, measure this distance from the corner, and then you know how far to place the shim tape on your jig.