after chopping bit by bit off of original and testing in my pioneer head unit, I finally got it short enough to not detect it as a cd. I have chopped the same or similar amount off of model and made a wider base to both fill the cd slot and give for structure. widened and depend the cellphone tray, as my phone just barely fits without case. all works!!
Cell tray in inches are 3/8" lip 5 1/4" wide and 1/2" deep, all inner dimensions