Update: First Refill
After using the printer a fair amount for around six months, it was time for a refill of the CIS. I got the $45 refill kit from the same vendor that I purchased the CIS from. The instructions were straightforward and well written. The refilling was very easy and I got only a few spots of ink on my fingers.
I had to add about 36 ml to the pigmented black and about 16 to 24 ml to the photo colors (magenta was least, yellow was most). Based on the amount left in the bottles, I'll likely get another year and a half before I have to re-order refill ink, assuming the shelf life of the ink is that long (comments, anyone?).
I've tried to do a cost analysis/comparison to the genuine HP cartridges but I've been unable to find any information on how much ink is physically in the cartridges. If anyone knows that, please post it.
I have a question for the forum - how should I clean the syringes? I've always just rinsed them with tap water and let them air dry but if that's not the best way, I'm all ears.
Thanks,
Keith