Dunno about it MAXIMUS,
To be honest I just shell out for the real cartridge as the refillable can get messy and god knows what kind of warranty it is.
You should really research it, but I'm always gonna stay way from it because I'm sure whatever it does to your printer if it screws up, they will not take liability and will blame it on your error for filling it.
I have an r800 and it gets very expensive to fill up, but I know the job is done right. You can try, but again, it may risk the wohle printer.
Costco has great deals on bundles, check em out
Best of luck