Print module – mat window layout and crop marks

Printing for a matted frame currently takes manual maths and a second application. I want to tell the Print module three things: the final trimmed paper size (e.g. 11×17"), the mat window size (e.g. 8×12"), and how much the mat should overlap the image (e.g. 1/8" per side). Capture One would then size and centre the image automatically, and print crop marks at the trim line outside the image. The crop mark offset should be set per side, because the border is rarely equal on all four sides. An optional faint guide line showing the window edge would also help when checking alignment.

When was the last time you were affected by this lack of functionality, or specific tool?
This week. I was printing an 8×12 window image on A3+ paper, trimmed to 11×17 for a matted frame.