Do you have another printer you can use to reprint the lower orion mount? I have made some changes to it which I believe will improve repeatability and mechanical reliability.
I haven't a chance to test properly but if you want to give it a shot, you are welcome to.
I'm using red 40-A-L o-rings on the bottom of the piezo, with about 20% compression by tightening the 4x mounting screws. I've modified the mount so that the o-ring compression is enough to keep the hotend steady but the contact on the peizo is much lighter than before.
Reduced the height and diameter of those bosses so they only located the o-rings.
Reduced the height of the center ring to match about 20% compression on the o-rings.
Tighten evenly until the centre ring is touching the piezo. You should still have a rigid mount but with 0.2-0.5mm compression when tapping.
Here is the .stl, make sure you print in 0.1mm layer height or similar.
These are the o-rings:
I will hopefully be able to spend some time testing it in the next few weeks but for now if anyone is able to share their thoughts that would be very helpful.