My suggestion of getting a bigger 12" chipper wasn't so much so that he could chip up to 12" but rather, so he wouldn't have to trim crotches so much. A small infeed will mean more 'babysitting' of the chipper and more cutting. Over time, that lost time equates to less income so long as work is stacked up behind you. If time is on your hands, then a few more hours a week spend trimming stuff smaller and babysitting a small chipper probably won't matter much. How busy Miller's business is, only Miller can answer. But, as the saying goes, 'time is money'...
AP
Bigger chipper is always better.Too many reasons to list!