Thank you all for your input,
I decided to go DIY route and found a collective base and a Kiowa grip that suited my plan.
The collective base is from the well known Rato's design found on printables.com. It was printed as offered, I just adapted the controller plate as it was designed for the blue pill but rather preferred to use a Leo Bodnar or even the GVL224 that goes with the hall sensor designed for this hardware (also from GVL224)
The design is great, well done and relatively easy to print (I printed this SLA) one small issue with inserts holes being just a bit too large and inserts not gripping as they should. but it may be my prints.
The same author offers a Apache Grip to go alongside its base but flying the apache sounds way too complicated for now so I wanted something more simple for a Kiowa which I found on Cults3D for a very small fee.
Again the SLA printing process was not overly complicated. I just had a few issues with the thread size (as always with 3D printing) but I'll blame my inexperience in the 3D printing field.
The grip in the process of being populated with a mix of real switches and 3D printed ones.
A 25mm tube connects the base and the grip and I added a motorcycle damper to try to overcome the weight of the grip.
Unfortunately the collective does not stay up only with the damper (although it's set at the highest resistance) and it slowly moves back to its resting position.
https://youtu.be/yDFkxhw-dSc
I need to fix this friction issue first as you really can't use a collective that constantly lowers the angle of the blades can we?
If you guys have any idea on how to fix this, don't hesitate to let me know
Many thanks