dont beat yourself up over the blucig purchase. 
I did the same thing, and when I purchased the blucig I had already accepted the fact it likely wouldn't be my last ecigarette purchase. 
 
So I just looked at it as an "admission fee". 
60.00 got me into the club. 
 
I started on blu, was unhappy.. found the 510, got two and a passthru, now am eyeballing the EGO passthru. 
 
atleast you skipped 510 all together. 
I am not unhappy with the 510 at all, I do like the ego's longer battery life and 510 compatibility with carts/cartos/attys. 
 
I like the small 510size, so I probably wont ditch my 510 all together. 
 
P.S. I kept my blu cig kit. 
the battery will drive (abliet slowly) a 510 atty. 
the blue atty's work on 510 batteries for dripping 
I've used a blue battery and a 510 atty while I was charging both my 510's. 
I've used a blue battery when my pcc didn't charge one of my 510 batteries due to a bad connection. 
(shuts up)