I am hoping to get some help. I have been looking at this forum for about a week now and have finally decided to order the Boge Leo Royal for me and my husband. This was the most economical set up with 2 complete e cigs. There have been a lot of reviews mostly good. My co-workers are all using tanks ( not Boge) and I'm a little confused as to whether to order standard or tank and are the interchangeable as long as I have the Leo battery? 

