Where to flow test injectors?

[Bleakley]

Figured I'd update this with my experience with witchhunter performance. DAMN did they do a bang up job cleaning the injectors. Nice before and after flow report as well.
The thing I am most displeased with is/was their inability to replace my filters/filter baskets. In my service request/invoice I specifically asked for them to do so. "The replacement filters for these are not available since they are used on only a few injectors."
Like, what the f***? Injector rehab has them on their site and they can replace them for you when you send yours in. I will be trying them out next time if I get a chance.

Cliff notes. I highly recommend witchhunter performance for cleaning and flow testing, new O-rings and pintle caps, but no-go on replacement filters.