I haven't at this point... because all my current packs are "old school" and don't have the taps.

All my future ones will have them though as the manufacturers have "seen the light" in that this is important for proper pack maintenance and safety.

Haven't even looked into it yet as fas as who offers what...

I currently have an ElectriFly Poly4 that I like well and hope to contiue to use... I also have a MiniRon Mobil that has 5 ports and the latest frimware seems to support the Lipos better. (Been testing it the last couple days).

Have you come across any balancers that maybe I should check out?