I get a fairly weak kickout on the grotto and at times the ball would not come all the way out.
I replaced the coil sleeve yesterday and noticed that the piston (rod) (not sure about the terminology) had a smaller diameter overall but with a plastic band on it as opposed to the same diameter rod all the way through the coil sleeve. Cleaned up and reassembled but still doesnt appear to have much power.
Looking at the band, I thought it was designed to cope with the angle of the kickout mechanism but I am not sure.
Over to the gurus!
J.D.