Did you use carts, or cartomizers?
I own both 510 stuff (genuine Joye from Cignot) and a Bloog Maxx Fusion kit. I never tried cartos on the 510, so I cannot speak to that. I did drip like crazy on 510 attys on both 510
batteries and eGo
batteries.
As far as BMF vs. 510, the battery life is
far superior on the BMF
batteries. 45 minutes to an hour on the 510 batteries vs. right around 3 hours on the BMF battery, if not longer.
The 510 carts need to constantly be dripped to keep the atty well-fed. The BMF only uses cartos (well, you can use any KR808-compatible cart/carto/atty on it, but Bloog Planet only sells cartos), and they are simply the best 808 cartos made, IMO.
I haven't had my BMF very long (just got it today), but I wanted to reply because no one else has, and honestly, if I were starting over I'd go BMF. It's more convenient, cleaner, the batteries last longer, the cartos last a really long time...I'd go BMF.