As many same experiences written on Forum Archives earlier; It happened to me on mine H340, last month also. ALTOUGH WÝTH SECOND REEF,IN 15-18 KN.CALM SEAS,TRYÝNG AN EEEEEEASY GYBE,THE CASTÝNG ON THE MAST PLATE ATTACHÝNG TO VANG,BROKEN. When I reported to Hunter Co.by my dealer,they passed it to Z.Spars.And the answer,signed by Julian Crisp says,they don't have NO OTHER ÝNCÝDENTS OF THÝS MAST BASE PROBLEM. Both of them (Hunter and Z.Spars)think that it's a users fault,altough they can see easly at least 6-7 same incidents reported on HOW Forum only. I haven't heard same problem with other boats but Hunters,due to huge main needs STRONGER HARDWARE NOT THE REGULARS that same size boats has. What is your owner's opinion on that subject? Does any other has the similiar problem? Thank you all...