How does one get added, and is there a good brand?
The question that first needs to be asked is: What works best for
your process?
I like as few engines to maintain as necessary, therefore like the idea of an 11GPM 2-stage PTO pump (really fast) on a 23HP BX.
I also am at a fabrication shop so while I "can" (and do) design and build my own equipment, doing so for
one of something rarely makes sense if someone else makes them in volume, meaning I "could" design my own but with a very competitive splitter market it doesn't make sense to do so, especially since they have years of experience making a better product than their competition.
Looking at the cost of a PTO splitter verses a self-powered, I'm inclined to go self-powered. The convenience factor other members talk about makes it that much better.
For you that may be different, and it's
your use that matters.