THANK YOU Minh.
Tried, still not working. I've taken another video now, this morning seems even more unrealistically unworkable. There must be something wrong in what I'm doing.
I have taken videos of me trying to hold either X or Y axis with no success in both perspective view (using 2 different lens angles) and axonometry. Can upload for you together with the latest pla file.
If you could provide us with a secure place for the upload would be fantastic.
Cheers, Claudio