Hey Bigtom, the reply from papabrett2011 could have been written by me. I started with a single speed 16" Ryobi and used it for a few years. I guess you could call it "learning the trade". But it broke blades galore and every time it did, it scared the beejesus out of me. I ended up quitting scrolling for a few years, but the desire to scroll gnawed at me. Like papabrett, I bit the bullet and bought an Excalibur 21" and WOW, what a difference. I very seldom ever break blades anymore, and if I do, I hardly notice it. No more vibration either. I still have my Ryobi though and use it at the cottage. Good luck.
Mike