Swaro Anti Rotation Tripod Plate Rookie Question

[6.5x284]

I have an ATX 85 with the older foot on the objective, not the newer ARCA foot. I previously ran an outdoorsman plate and it was fine. Now I have an ARCA head and the ARCA tripod plate I have is smooth and rotates when tight loosening the spotter from the plate over time.

Does anyone have a good recommendation for a light tripod plate that is ARCA compatible and has the anti rotation pin? Swaro makes some but in picture they look about 3 times bigger than the actual foot is.

Appreciate any feedback.

 

[sndmn11]

You can drill and tap the plate for a set screw that either comes through outside (touching the edge) of the foot, or pushes the bottom of the foot, or goes into a recess or other hole in the foot.