Mearuments required:

 1 -poling platform leg diameter or circumference.

 2 -poling platform leg angles -both dimensions if compound angles.

 Trolling motor applications only need shaft diameter approx, no leg angles(2).

-mounts with compound angles will only work in one location.(port or starboard side).

 3 -arm "length" is measured from center of leg to center of anchoring pin.

 4 -your anchor pin diameter when applicable.

 5 -port or starboard side?

  -PICTURES WILL HELP !!! -photos from the side and directly behind leg at proper elevation and distance away will help.

 -if we can see leg angles/ position in relation to boat hull we can figure proper angles with great accuracy, BELOW are example pictures of what we'll need to figure leg angles for you.