Plasterers scrim tape corner marker

I needed to do a bit of plastering and one part involved cutting the scrim tape to suit an old covered window alcove requiring some 45˚ cuts in the scrim tape, the tape I have selected is the brand with two metal strips running between / close to the centre of the tape so tin snips are required to cut the tape.

To speed things up a bit I designed and printed a very simple tool to mark the tape before cutting with the tin snips, saves messing about with a protractor.

To use:
Hold the tape