Just had the gaiter replaced on our 1996 Bav35H Implacable. It was done previosly in 2003. Whilst off the N Brittany Coast this summer we had a rope round the prop which jammed the gear box! The French engineers replaced the gaiter whilst doing the Euro 3,111 work on the gear box. My insurance excess seems to be a “good deal” to change the gaiter.
I don’t recommend this as a normal course of action however!!!