Length does matter
Great ideas! Bob B's does look stronger than a hinged version. sand sailer's idea leaves me a little cold. Not because he mentioned he's an engineer- oh, alright he's a snipe and I'm a deck ape.(20 years at sea, merch mar and old attitudes die hard). The ignring is fine, but it would need either nylon slides, ala backhoe extendable booms, or a ton of zerk fittings. Since the extension would be housed most of the time, it would be susesptible to setting up in the sq. tube. Anyone that has left their hitch in for over a year, in Michigan, knows what that is like. By the way, the approved method for removal does not involve a telephine pole. Telephone poles are too weak and when they come down someone always gets your plate. Use the same chain you were going to put around the pole around a large tree. Junk 2x4's around the base will minimize trunk damage. Wear your seatbelt. Once you get it moving, don't pound it back in. It will come out just as hard as if you never moved it. When out, wire wheel it, and coat it with Marfax or axle grease liberally each time you use it. Do not use Neverseize! Neverseize cakes up in any weather and becomes are hard paste. I first learned this in Paranaqua, Brazil where I was delayed sailing 4 hours by a set up pin on the container crane. A pin that got moved every day, too. Expensive lesson (about $10000), even tho manf. recc. Neverseize. The other problem I foresee is that if you happen to bend your extension, while extended, how are you going to slide it back in and tow your boat home? If you make the channel in channel loose enough to keep from setting up with rust/grime, its going to be pretty sloppy and your'e going to have alot of banging around of your trailer going down the road and alot of shock loading going to the ball. I'm willing to be persuaded, but it looks "over-engineered" to me.