Regarding the holes and slots.
What is the best method for cutting these out. This is my second sub, my first was a dynamic diver I built up from scratch using balsa and perspex. It worked but not as much fun as I hope this one will be.
I have started the slots by using a flexible shaft on a small type of die grinder. Am I doing it right or is there a better, more recommended method, someone in the local boat group suggested a template but I think it will be impractical on the lower hull section.
I hope to post some photos later but I want to get this part of the job done first