I also heard that Hcigar have made one called the m40 which is their original design rather than a clone
http://www.ebay.co.uk/itm/231113291807?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2648
honest answer i dont know it was another thread I heard about i think it was Mawsley who told me about itI have looked at that one but the question is is it any good ?
I have an ehpro side button that is looking for a new home if you are interested!
18350 to 18650 batteries. SS with brass contacts & button. As new condition