Hello, today I bring an issue I am having with my MiG-21 replica build, I cannot get the cockpit fuselage the right cut without leaving a odd flat gap between the fuselage and the canopy, if I could have some help from someone who know how to fix this that would be great, and of course you would be credited in the post once I (eventually) post it, just comment if you are willing to help, thank you.

The cockpit right now

The cockpit if I cut it