If you have the time, self cleaning is fairly easy, just time consuming.
Flow matching is a different story lol.
all you really need is a 12v battery ( I use a small motorcycle battery)
Some clear hose
Wire (red and black)
Spade ends (to attach to the injector) I used a injector plug that I cut from a car in the JY
A two ft piece of flat metal with a zip tie or two
a bucket
Beakers if flow matching
A couple cans of carb cleaner
and if your trying to flow match a thin piece of wood with 5 holes drilled in it to feed the lines through to put above the beakers