I can see why people are a bit aprehensive after looking at the drawings, for 1 offs they could look a bit of a nightmare to someone who runs cnc's for a living and prefers large qty jobs instead of 1 off's.

They could turn out expensive but it may be worth while having a chat to see what I can do to help. I live just outside Derby and know a few company's that may be able to help. May need to change your design's slightly though to save you a lot of money! But I can help with that if needed.

I will drop you a pm with my number.