No Kevin, you are not safe, the stunt that you just pulled could burn down everything in the area. Or worse, it could electrocute you. Things may be tight, but surely you can afford a fuse. Stop using the saw until you have a proper fuse, otherwise you could burn out the motor to say the least. Stunts like this pi$$ me off to no end. For me, this is something that should not get you any praise for you ingenuity, there's nothing smart about what you did. Electricity is nothing to fool around with, I thought you were a pretty smart cat, but, stunts like this makes me wonder. OK, I'll get off my high horse now, and I apologize for being so stern with my reply , it's just that I thought you would know better.
Len