Also take some material off like a chamfered edge , leaving the outside edge as it is but cutting back on the rear edge , so the bottom of the panel is further in ..does that make sense ?
This will keep the visually best gap you can on the outside but remove the material that is fouling immediately as you lift the panel ....one problem with opening panels on fibreglass cars is they are often thicker than their steel or ally counterparts ..therefore a slightly different approach is required ...
I have just done the chamfer trick on Ray's Formosa as it wasn't fouling , but was very close and didn't want the extra paint thickness to change anything ...
You will probably end up fettling and gapping again at the end of the build just prior to paint ..so don't get too involved in a job that might need re-doing later ...