Gears playing clickety jam running flexibles? It's not a setup issue. It's a feed rate issue. Think much hotter, maybe even beyond your manufacturer recommended temp. 220 is rookie numbers in this fast direct drive biz. In the big leagues you gotta go much hotter. I cranked my sainsmart and yoyi up 5° every time they failed. I'm getting excellent prints at 250 and absolutely NO jamming. Will post pics when done but I think this is it gents.