Edit 3d file

Hello, Freelancer!

I need a follow up project based on the image attached. On this file I wish to:

1. Change the base part (illustrated on cap1.png attached to this project).
2. I wish to make the system taller by increasing from the base up (without extending the threads).
3. Today the outer neck has ~15mm and the inner neck ~13,5. I measured them with a ruler and eye. Not very precise.
4. I wish to have:
4.1 Inner neck 23,3mm
4.2 Outer neck: keep the same difference it currently has from the inner neck. If they differ 2mm, keep the same 2mm. If it's 1.7mm, keep the same.
5. As I mentioned above and wish to have the threads moved up exiting the base of the neck. As per this video: https://youtu.be/Eq3Qvc45i4I

I would need the final file in:
- png (same angles as cap1.png)
- max
- mtl
- obj
- step
- x_t

I can provide you with the source file as per cap1.png in the following formats: max, mtl, obj.