fan duct mount bltouch 3d touch modified

I couldn't get my fan to fit on the original by WhateverWillSee so made the following changes to it.
Sliced the fan mount off in Microsoft 3D builder and scaled it down a fraction, then thickened the walls by making a copy of it and putting it inside the original. Printed out fine and my fan fitted but the screws I was using wouldn't let my 3D Touch fit so back to 3D builder and sliced out the Bltouch/3D touch mount, shifted it out by about 5mm and inserted a scaled cube in the gap left. Printi