Maybe it's not new, but I haven't heard of it before. You can install your transmission and flywheel assembly SITTING DOWN. I used to be able to do this standing up, but I can no longer align the dowel pins into the crankshaft while attempting to start a flywheel bolt standing. First of all, the engine is on an engine stand in a horizontal position, just as it would be in the chassis. I have a stool next to me with the transmission sitting on the stool, which is about even with my two legs while sitting down. I place a worn out bath towel folded over 4 times across my legs, and move the transmission from the stool onto my legs, with the transmission in the same position as it will be when assembled to the engine. I then tilt the transmission toward myself so I can see the dowel pins, and adjust the flywheel so it appears to be about the same alignment. By the way, I have two flywheel bolts already in the crankshaft flange ready to screw in. Using my legs and knees, I position the transmission into the flange of the crankshaft. This just doesn't happen automatically, but with a slight rotation of the flywheel, and grasping it to the field coil, they will fall into place fairly easily. The flange on my crankshaft will not hold the flywheel on with out using the two bolts waiting for me. I used a common woodworking handscrew to clamp the upper portion of the flywheel to the field coil. Once I did that, there was no danger of the flywheel dropping off, and I screwed the two flywheel bolts in.
I had to do this a number of times to get the proper clearance between the magnets and the field coil, but it is pretty easy for us older guys!
I'll keep this in my files. My back isn't what it used to be !