I have dived deep into the forums doing research. I do plan to pick up a 41. turns out there is a tractor supply literally behind my job. till then I've straightened out my 415 and moved the tensioner a few inches forward. I need it on, or the bottom of chain hits part of the frame. I'm very confident this is just about right now. about to put the clutch arm and plate back on now and give it a try.