I have a b2410, and I have a crazy bearcat 4 inch chipper,which is an old model,similar to the ch5540 echo bearcat.
It is a well made robust little chipper with greasable bearings, double edged knifes,and works very well.
Link;
http://www.bearcatproducts.com/products/pto_machines/ch5540/
These people have made a range of chippers for many years,and they are respected in the tree and hire trade.
I use mine professionally,along side a large self powered chipper and have found it a simple machine to keep running, and a viable product to run on my little tractor.
Though you might consider hiring in a chipper for your trees if it proves cost effective, and you have little use for it after your outstanding tasks.
Here in the UK these chippers were often used in the hire trade, proving their durable build.