Hi there,
This is Bogdan from Romania.
I'm a mechanical engineer - specialized in the industrial robotic field, 3D designer and modeler (from time to time and some projects I could make the functional prototype too).
I'm doing product design, industrial design, reverse engineering, ideation, etc.
I have over 15 years experience working on various systems/devices across multiple industries, from concept to launch.
1 - sorry, but from the short description and the attached pics is not quite obvious what you need/want (maybe, because i'm not a fisherman... :(, but this will not be an issue to make the model accordingly with your expectations)
2 - could you provide me more pics, drawings, sketches examples of usage?
3 - usually, the process is an interactive one - you provide the basics, i'm doing the design, you make the annotations/amendments and i will make the correction - until we reach the final model
4 - ip rights belongs to you of course, and if necessary, you may even send over the transfer agreement
5 - the price could be lowered, and we could discuss about, when i'll fully understand what is about
Regards
Bogdan