Bass in my opinion will eat a dragon or damsel fly better, dry or nymph if it has eyes. This is based on many hours of casting foam dragon flies to pond bass and watching there action. Began using store bought mono eyes for these patterns based on the success rates.
Mono eyes cost and aren't in ever flyshop around.
You can melt line and make eyes. Started that and did ok. Seemed to take a lot of time and always resulted in burnt finger flesh.
A fixture to hold mono ( feed trimmer string ) and shape it as it's heated.
Sketches and prototype coming soon.