Hi David, welcome to the Village. I'm Marg from Australia. Your first cut is better than mine was and that was about 16 years ago now, and I still love every second of it. Ask all the questions you want and you will get an answer even if that question has been asked a thousand times before by a thousand other people. If you don't ask you don't learn. Also the suggestion about the aquarium air pump is a really good one, its cheaper than a new saw at this stage.
Marg