I read on the US Lemo thread that the stock coil is 4 ml Ian, I did notice how bloody big they are, and they also seem to have a lot of cotton in the stock as well, so replicating that sort of set up seems to work best.
Next on my to try list is a parallel mate![]()
yep I did notice the stock coil I could drive my bus through it

I will try a 4mm at some point though. A parallel wouldn't work though in 4mm. There's not much room left doing a smaller diam parallel coil. Those coilers I've got coming should make parallel coiling a lot easier