This is an universal highly-reconfigurable holder. It features rough adjustment in 2 axes without blind spots using two 17mm wrenches and precision adjustment in 2 axes using 2 13mm wrenches. The precision adjustment has gear ratio 1:300. The holder is suitable for holding any Ronja optical head.
From one side, a 25mm long 10.5mm hole for M10 bolt is provided. From the other side, three equaly spaced (spacing 30mm) 8mm long 6.5mm holes for M6 bolts are provided.