Manual! Starting in 1989 I bought component parts in bulk and assembled my equipment myself out of my inventory. That included making my own distributor tubes, Turbulators and the Technetic dual distributor tubes. When I started selling online I ordered each of the component parts and had them shipped to my customers and emailed them my instructions of what to do when, how and in most cases why; such as how to tighten the brine line fittings and I didn't have brine line fittings sucking air or any other problems with brine systems.
But you can do it any way you want to.