M6 nut in the shaft, M6 countersunk bolt, crown the shaft with the file so that it bites the plastic and can't rotate. Job done.
I did this on my helles belles head and the plastic just got knawed away but the teeth in the shaft. My RV head might be better however
@errm_rich started
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I did this on my helles belles head and the plastic just got knawed away but the teeth in the shaft. My RV head might be better however