off-car mail-in injector services?

I'm just about ready to start putting on the outer engine parts like manifolds.

I posted a little bit ago about injector sizing and whatnot. I figure that with wear and tear, I probably have about 5% variance (or maybe like 0%) variance in dynamic flow rates on these injectors. Rather than buy a set of graduated cylinders and rig up some kind of manual (or build an electronic) test rig, I would rather mail them out.

Anyone have a place they recommend that was super honest or otherwise better than some random place?

Injector pulse is local to me and do a great job at a fair price

RC Engineering is the go-to place for injector cleaning and flow testing. Their service gets a bit expensive for a V8 but for a 4-cylinder it's $100 plus shipping. They are just down the street from me and they do good work. There are others, but I don't have personal experience.

https://www.rcfuelinjection.com/Store/c/fuel-injector-cleaning

This was just discussed :
https://forums.tbforums.com/showthread.php?t=358785