The canopy has no front bulkhead to reference to - that's its problem ... it just sits DOWN onto the curved front decking. The only bulkhead is the rear one.
The U/C has no blind nuts at all ... no joke - they give you 4 typical SERVO screws !! You know the ones with a fixed washer shoulder to screw your servos into trays ... THAT is what they give you for fixing the U/C. I compared them to my boxfull of spare screws from servo bags ... IDENTICAL. So well see how long it takes to rip those out ... Personally I much prefer nylon bolts into blind nuts ...
Nigel