I quickly threw an oven together today with the help of a couple of friends who dropped around to see what I was up to.
This is not the "all singing all dancing" oven that I want to build to post cure and rapid cure of components but something that will heat both sides of foam up to 1200mm x 450mm so I can start planking the floats. The oven has 3 configurations that will deliver either 78degC, 103degC or 120degC. I put a couple of test pieces of foam through it today and while the foam can be bent at 78 it is easier and has a much better memory at 103 deg C and above. So I'll go with the 103 deg C config and this should help the planking go smoothly and quickly.