Thank you all for your suggestions
My current setup is hw97k with a Falcon T50. Sporting sportsmatch ATP61 and... my zero moves.
Every now and then i need to find zero and adjust my elevation knob. Scope is as solid as it gets, the position of clicks stays solid, i only need to 'translate' everything up or down.
And it's driving me up the fkn wall.
Regarding BKL, i've seen them and they're sexy as hell, but sadly one can't fit a Falcon in a one piece BKL mount - no room.
I'll check all the other out.