Not an invention so we've hijacked this thread.

Towing backwards (stern forward) solves a lot of problems if stepping solo. On our beach you can regularly see solo mast stepping on all kind of boats like Mike's Mystere 6.0 as well as a Mystere 5.5, 5.0 and 4.3, a P19, P18, P16, GCat 5.7 & 5.0, Hobie 16, 18 and 20, and ALL Darts. I think Smitty even runs his I-20 this way.

Here is a photo of my M5.0 with the mast in the trailer cradle as I begin my lift, mast pinned with a long screwdriver. The downhill slant holds the mast past vertical as I step forward to clip the forestay. Quick, easy, solo; NO INVENTION other than a good idea. Note the P18 doing the same in the background.