Excellent work! I have a few lengths of heater cable which we used to cure masts. Looks just like conventional power cord. You plug it in to 240v and it heats up to a given temperature (mine are 60C and 80C, then turns itself off until the temperature drops a few degrees. May do the job easier than a heat gun.
I have been having fun with a section of 60mm square section steel section, a heat gun and a 500mm long section of 15mm polycore. I managed to get a chamfer of 3mm deep 50mm wide suitable for joining sheets requiring fairing, a taper down to 3mm on the edge over 50mm width for tapering to the solid glass corners associated with Rob's latest Origami, and three 5mm deep grooves pressed into the panel that allowed a right angle bend for the half glassed technique for bending. The heat pressing technique may also be suitable instead of de-coring in places where there is high compression loading such as winch bases.
I did this on a cold Canberra day with no insulation using only a heat gun for heating. I am fairly confident that it can be done on 2.4m lengths if set up with a 3m long steel section, some old blankets for insulation and some guides and clamps to give the controlled compression.
This has taken away most of the doubts about using polycore.