Badger SOTAR Trigger Riser

I've noticed that BADGER has rised triggers for theirs airbrushes. Rised trigger improves precision of airbrushing. Unfortunately in my country there is no possibility to buy this part easily and when it came up it's overpriced.
To resolve this issue, I designed this riser.

Update:
3 versions of my model: first with concave top, second – angled with more grippy stairs, the third stepped without any slope.