I just got a new style (double armed) tiller ... It comes with a bolt and 2 washers, but is set into a hole whereby one cannot gain access with a wrench or even pliers.
That sounds like they at least sized the nut and bolt head one size different ... typically done because most tool boxes don't contain two of the same size socket.The nut end can easily accommodate a socket but the bolt end has very little clearance at the edges.
I'd be calling up the dealer who sold me the part, at very least.I would consider myself at a very minimum a middle of the bell curve person mechanically. It seems to me if the builder (LP) of a class (Sunfish) wants to grow the class they need to have better communication with it's users. If PBA hadn't had the same issues and chimed in I probably would still be in the garage scratching my head.