Hi everyone, Just got back to scrolling after a year off. My Ex21 was in storage for that long. I having a little problem. I have the new pegus blocks on there and they were working fine. After I.m scrolling for a minute or so the blade will pop out and the white lever pops open. I'm also getting a banging noise on a higher speed which will last a couple minutes and then it just stops and is really quite. I don't see anything loose. I am on a cement floor in the garage. The noise comes and goes. Any ideas out there. Might have too get a hold of Denny and finally order my new saw. Thanks, Ralph>