Just decided to have a specific fuel tank mould as knife and forking one from the monocoque mould was never going to be perfect....

Cure cycles are hard to pin down.. It depends on the oven, mould, material and may need some testing. I would suggest getting a ramp and dwell controller ( a rework controller for electronics rework stations work but need a little thinking about as they usually only work in seconds per sector so you may be limited to 8 sectors at 9999 seconds each.) I am using one myself and have a 3 stage cycle with a lower temp first and a ramp speed of about 1 degree per minute then a dwell set before going up to the next step again at 1 degree per minute, dwell and then the final temp at 1 degree per minute to complete the final cure stage. 

I spent about 6 months testing materials and cure cycles to perfect mine. The dwell lets the mould catch up with the oven and I keep it below the lowest suggested cure temp for a while before the final stage goes into the actual cure temp and cure duration.