Hello, I purchased Aiva 1.75x about a year ago. Very happy with the image it produces, I have used it in 2 music videos lately and plan to do more… but I have one issue, which I do not know if it is “design” matter or is it just my Aivascope unit? The focus ring is very tight when getting closer to min. distance and when going to infinity ie. both ends. I am using Tilta Nano focus motor (with Axoncine AXC BM3DF G2+DJI 3D focus) and the motor struggles to pull focus, especially closer to the end point, sometimes also in the middle. It is currently getting only 5V, but I have ordered a cable to feed higher voltage to give more torque. This of course could solve the issue, but I am afraid it might also turn the whole Aiva (and mess the alignment), as it is quite tight. There is also metallic rubbing noise present, when turning the focus ring. Is this normal? Is there something I could do myself to improve this? Any advice would be greatly appreciated.