You could easily run a WM WC88. We've a WC46 (4x6 hole) and love it. Can often stick the base of a long tree into it, and it'll just chew it up. Like anything else though, it has its things to learn about it. Think we have one more chipping trip before the bush hog has to go on. Wife has been busy with the chain saw cutting up the last bits of stuff.Can anyone recommend a good self feeding chipper that will run on a 50hp compact tractor?