Until a full out 503A is made to replace the 505A, the best replacement i have seen is the GAME ON. I seen alot of motion of the 505C in the gameplan and the motion of the 505A in the game on, last year. I have customers i have done this for and they were very happy.
Mark "scoot" Trgovac
C-G Pro Shop
Youngstown, Ohio
Track Bowling Staff Member
Track HITMAN.
Tag Team Coaching Success Story.