Re: Harken MkIV or Furlex 200s
We have the Harken Cruising furler (similar to MKIV but single groove and fatter foil) and the only issue we've had is occasionally, for reason's I've not yet been able to nail down, the furling line escapes the drum cage and locks itself, effectively 'jamming' the furler. It's only happened during sailing, never part way through a furl or unfurl. Requires a trip forward to straighten out. I suspect it happens at the end of an unfurl with too much slack in the furler line.
Other than that (and regretting not going for the full MKIV after all) the only beef is the crappy, slippery furling line supplied with the unit.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)