So, we have a 1/144 Mustang out there from Platz/Eduard, and an interior detail set from Eduard as well, available on in their own release. The canopy on the basic kit is closed, and within the limits of thickness which can be successfully injected. It fits and looks nice (and the Eduard kit has a masking set to go with it.
Insane? Yep. But an open cockpit requires an open canopy. HEAVY insanity. I had to try it. Tweezers: yep. Magnifier for vision: Mandatory Ham hands: Standard.
Here is where Brengun excels! They provide a set of four canopies in a clear plastic envelope which allows (with careful, NEW scalpel or #11 blade work) an open canopy!