Ok here is what happened, my dremel scroll saw had some wiring problems so I took it in to a shop that fixes tools.  For some strange reason they took off my wing knob for the blade instalatoin and I didnt realize it untill I got it home and they were closed for the holidays.  I am sure that when I do call them they wont have the knob or cant find it.  I bought some different kind of screws but everything I use just bends the blades or they slip out and I am driving my girlfriend nuts becouse im not out in the garage anymore lol.  Thanks for letting me vent a little and if somone could tell me what I am doing wrong or any advise at all would be helpfull.  Thank you very much

                             Bryan