Saving a canon pro 10 printer, one day at a time.

[palombian]

I just want to. It's both to keep the "waste tank" clean (canon should be hanged for handling waste ink like that !) and to monitor how the printer waste it's ink. I'll also put one on a pro-1 and try to revive it but i have to flush the printhead and having 150ml of ink down the drain makes me sick. So not sure how i'll proceed

Anyway, it will make you sick when you see "how the printer waste it's ink", so don't do it.

Use the printer for photos, posters, booklets or whatever enjoyable project.

Regarding inks, octoink.co.uk is IMO the best 3th party solution in Europe, for good PBK adherence on glossy photo paper you should buy a large format carts (as PFI106PBK 130ml).
PFI Red is technically OK too but slightly different color than PRO-10 and PRO-1. 3th party Red and Magenta are the most clog sensible inks, clean your cartridges before refilling and watch your nozzle checks.
As you observed yourself, 3th party CO is not on the same level as the original (the only perfect one came from Precision Colors), I buy PFI1000CO or PFI1300CO now).
All other octoink colors are 100% OK, so this reduces your average ink cost.

All this applies to glossy photo prints, when you print on matte, poster or office paper any ink will do.