I am in need of some information on shredder/chipper combination gas units. All the ones I have looked for $1000 or less seem to have a very narrow chipper chute, e.g. Brush Master CH4. I have never used one before but it seems I will be spending most of my time stripping small branches off the even smallest of limbs to feed the chipper, and then breaking down what I have stripped off into even smaller pieces to fit the small opening. My question is, at what point will the diameter of the remaining pieces be small enough to feed them directly into to the shredder with its larger opening? 1/2" 1/4" 1/8", no twigs what so ever? My guess is a lot has to do with the wood type and if is dry or not but I am looking for general guidelines. Is one brand or model better than the others with this in mind? Thanks.