I am sorry to post here again, but I can never seem to find what I am looking for using the search feature. I gave up on the ProTank. Just could not get it to stop leaking no matter what I tried, and I tried all the suggestions. So, that being said, I am going to stick with my T2's. I would like to rebuild the atty's and have ordered the kanthal wire and silica wick. Can you tell me if it is necessary to have a voltage meter to measure the ohms? Or can I assume that 5 wraps is approx. 2.5 ohms, so perhaps 4 wraps would be closer to 1.8 ohms? If I have to have the meter, where is a good place to order it? Thanks so much for all your help. This forum rocks, and the veterans are so patient and knowledgeable.