Expensive mistake

 well not making sure the green rope is really tightly tied is an expensive mistake if you turtle the boat and lose the mast chocks 

have to make my own i think 

update

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 i have now added 2mm line to go thru the rear chocks with a recess for knott the trailing line can then trail down the mast hole and be secured off as with the front chock , cant afford to lose them again.