Until the depression, I did a lot of work on other people's boats. On more than a single occasion, I had to repair woodwork that had been damaged when an owner tried to swap out 4D(135#) or 8D(168#) batteries and they lost control of the load.
When ever I was asked to do this, powerboats were usually refused and the sailboats had to have a means to use the rig to swing the battery ashore/aboard.
My coach came to me with a single 4D. Fortunately, I was younger then, but it still got changed out to a pair of GC2s at the next replacement. I can still manage a GC2 alone.....
Matt
