Now the cone worked perfectly for me, I just need to make some aluminium toggles to Mount it.
I drawed some models first, and then made one out of 10mm thick MDF.
I drawed it out on an aluminum plate of 6mm thick.

I sawed out the toggles, and pasted them on the MDF, and held them against the copy mill with this result.

You can also see that I modified the model a bit, on the front. I made it rounder, so it looks a bit like a sled now.

What you can also see on the alu, is that I used a new mill. The sides are more smooth then usual, but some polishing will still be necessary.

This aluminium plate I made for the PPI, I modified a bit, so I can still use it in the new set-up.

This is the kind of build that automotive engineers need to read up on before they design the crap that rolls off the assembly line. This is awe inspiring.

I am just starting out in this industry..........sort of. I've been a novice for about 17 years, but spent the past 20 years in the US Navy. Now that I am retired, I am going to a Mobile Electronics school so I can do this kind of stuff full time and have access to the right tools and facilities.