Source: 2000 Beartracks, Bob Barrows
Reference Drawing # 14 - The aileron cable pulley can be changed from a AN210-4A to the 1/2" smaller O.D. MS20220-2 if needed to allow the aileron cable to better line up with the wing strut.
If you use the MS20220-2 pulley you will need to bush its I.D. to 1/4" or use a 5/16" bolt and drill out the pulley bracket.
Inspect the line up of the aileron cable to the pulley, if not close to centered the bracket may need to be adjusted a little for proper line up.