Although my mould is not quite finished yet can people see if it's going to be okay to vacuum bag it? My idea is to lay some Carbon Fibre and use Fusion Fix spray around the outside top edges where the green arrows are pointing to secure it and then sealing the bag all the way around on the underside of the mould, will this work?

I am a little confused as to what you are planning to do. Are you bagging these pieces separately or trying to bag them together with the carbon between them or is the carbon going on the outside?