Need idea! Extreme horn stand

[rendoman]

Hi all!
My last project is a conical horn for a big compression driver, the unit Nt1003L from Hiwell. Neodymium magnet, titanium large diaphragm 4", exit 2", according to measurements perfect for Hi-end use from 450 to 5000 hz, out of the box, with some mods it's possible to extend the lower end.

The turret has a flat bar, the angle has to be adjustable in order to match the axis of the listener, according to speaker height. A threaded rod would be the fast solution, the micrometric steps would be very nice, above all with a knob (spring plus ball).
I'm thinking about bulding a sort of mechanical piston, I'm searching for something nice to see also.
Any advice welcome!
Thanks!