That's that sorted then!
Yep, it's often very difficult, especially in 1/72nd scale, to be able to position the canopy open unless the kit parts are provided for this. The reason being, as you've discovered, the mouldings are too thick, and can't always be successfully thinned. Vac formed or heat formed canopies, made from thinner acetate or clear styrene sheet are the answer, and it looks like Evan has you covered.