Digital BW, The Print

For about 2 years I have been trying to get BW prints out of an R1800 using MIS inks and various versions of dilute MK, 3MK and colour MIS inks.

I have tried Inkjetcarts refillable carts which worked for a while and then refused to flow ink.

I tried MIS carts which are the same as the really cheap ones I can get from Hong Kong and just seem to dump all their ink straight through the print heads. 

I have been through a set of 4oz MIS ink bottles, a 500 ml bottle of eboni and a set of 8 oz Inkjetcart inks (which seem to be the same as MIS but quite a bit cheaper) and am yet to get ONE print out of it all. I am about to ceremonially tip the lot in a dumpster but thought it worth one more question to this board:

Does anyone use refillable carts for more than 2 years and if so which ones and how do you get them to work?

Failing that if anyone in the UK wants to make me a modest offer for the whole lot and live within the home counties or London then you can take the lot and I will go back to OEM HP stuff that is a lot cheaper and better quality in the long run.