interesting, I didn't know that. thanksHey David, I didn't realize your design was a generation older than mine. The infeed is straight through, that is actually preferable to what mine has. When Carlton started making their drum machines they actually copied the design of your chipper. A friend of mine has the 18 inch Carlton and if the wood gets past the feed wheels, it gets chipped. Mine has a wider infeed and will fold limbs over a little better, but the narrowing occurs at an angle just before reaching the drum. If a side piece catches just right, you have to reverse mine to get it lined back up again. That doesn't happen on your design. Should be a stronger selling point considering that's what the brand new machines also do...