Praki, you will be very satisfied with the Cone refillables. I started with Inkjetcarts ~20 mos ago using the large 150+ml carts that stuck out from the printer. Excellent performance, no real clogging, just cleanups for a few nozzle checks. I switched to the Cone setup for 2 reasons:
1: bumped into protruding carts to often
2: I print as a serious hobbyist and for club competitions. 'Finally' when my 150+ml carts ran low I noticed slight banding occurring in heavily inked areas. especially so in my B&W prints. I don't believe the 3880 pressure pump can follow the ink demands of a large 'almost' volume. It may be possible that some air is finding its way into the ink feed under these conditions, the banding is just barely visible.
The Cone system also performs excellently, there several other vendors offering the 'same' 80 ml carts; to me they appear identical and share a problem of major concern. You will be mounting the OEM chip under a control chip assy that is spring loaded. There is a tendency for mini PC board to lift up (experienced on my Cone and Inkjetfly carts)--read about these details on DPReview and the Inkjet Printer Forum. Then place a strip of Mylar tape over the rear of the PC brd to hold it down.
DO minimize removal of the carts, the ink output port is not as robust as on the OEM cart. Instead of removing each cart to gently shake the pigment ink preventing settling, place a strap under the printer, in front, and gently raise and lower the printer several inches up and down-the mini tsunamis will do the job.
In addition, note that the refill ports are located on the rear wall, not on top of the cart! This almost dictates cart removal for a refill--instead lift and support the printer almost vertically and then refill.
When you do refill, add additional ink to each cart to guarantee that a cart does not run 'dry'--the ink levels shown by the printer will not be accurate and cannot be counted on! Each time you turn the printer OFF and then ON the chips reset to 100% full-empty or not!
A small LED light will enable you to estimate the actual ink level--if in doubt top up!
good luck irv weiner