Sorry not a flex head it is a grain head CS or a G series would be similar, not sure what a-arm bushings are?I assume you mean the brass bushes In the wobble box. I thought there was no play in gearbox drive pulley starts at 12 o'clock and knife changes direction at 1 o'clock, there is however 3 to 4 mm of play up and down at the arm that goes onto the knife head, this might be too much perhaps? The only way to fix that would be to replace three needle bearings or to replace bottom shaft? What are your thoughts on this
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