This helped massively! - posting information I found below on a Corsair forum, doesn't give me the ohm resistance but it at least gives me the regular draw that it would have. I'm glad there's a lot of people who have done resistance mods in the past I was sure I wasn't the first one haha. Despite all the RGB mods and such I just want that micro display for some monitoring I may be able to work out in the future.
The only thing that makes me sad is how annoying it is to change the tube size to a more common one....oh well it'll all work out in the end.
The "ECO II" pump unit "CoolIt" has a 12 Vdc, nominal current draw of 0.1 Amp, drawing 1.2 watt. The maximum flow rate is 2 Liters/ minute. The max. head is 112 cm of H2Oand max. noise level of 23 dBa at 2100 RPM +/- 10%.
The pump unit for the "ECO II-120" varies with the flow rate of 0.94 Liters/ minute. The basic difference between the two is the halved flow rate for the ECO II. Normally this would indicate that with the pump prime mover staying the same the pump displacement has been halved. I can't be sure which unit applies to the Corsair units as obviously these numbers should apply as proprietary information for contracting parties involved. Sooooo...., some more info for the masses who care.