OK, wheres the great price you were negociating?
BTW, I've never had a clogging problem with the Scencient ink or the Repeatotype which is mainly what I have used to refill over the years.
Currently running 13 Canon printers on a daily basis. We run them until they wear out. Some carts have been refilled over 100 times. Some are continous feed.
I've tried refilling and remanufactured HPs and forget it. They clog when you look at them wrong.
Epsons are known cloggers too. Even with their own carts.
As far as the PC World article...it's tenuous at best. They really didn't know what they were testing. Seems like they just picked a few vendors. Printpal, Carrot, Printek, whatever. Not very complete. They should have broken it down to ink manufacturers.
As for that PC World article, which was YOUR INK? in their test?
Yeah, Rainbow isn't as good as some others.
I see you point about mixing the ink in a way. Say, while repeatotype maybe the best for one brand of printer say HP...but formulabs ink might be better for Canons etc. This can be taken further to a color for color breakdown. I've found the Formulabs Canon magenta better than repeatotypes magenta, etc.