Cheers Oli, I didn't noticed any major difference, but I'm cutting the nicotine quickly, I'm on 8mg right now, so is hard to be objective. I'm using 2.5 ohm resistance right now, because the 1.8 ones ware out of stock. I believe because 1.8 is better. The ones with experience said that 1.8 will give you more vapour, better TH but lower flavour. 2.5 is better at flavour and will protect your battery better. Personally, if I have to choose right now, I'll be for 1.8 if I could find them. But remember, and sorry for repeating myself, I'm cutting the nicotine, and to be honest, I feel like I need to vape more often.
Regarding rebuilding them, I used 1.5 kanthal and I felt less burned taste. Today I did another one, but without double legs. Looks like original one. I used 1.5 wire , 6 turns, held the silica and the wire over a flame, then I put it in the resistance body, did a dry burn, put 2 pieces of 1 mm silica above (very important for flavour) and that was all. I don't find my measuring device so again, I need to borrow one from a neighbour to see how many ohms did I get. Just to be in a safe zone, but I'm aiming 1.8- 2 at maximum.
As a side note, I would not bother making them, but I bought all that wire and stuff. They are sooo inexpensive, peanuts like you said.
So, did you try it? The Evod? I'm pretty happy with them, the oldest one is almost 3 weeks now, and is doing fine. I did cracked one around the mouthpiece, but was my fault, trying to clean the shirt out of him, stuffing some ears stick in it... but amazingly, it still no leaking.
Sorry for not being able to give you a strait answer.
Cheers,
Stefan