I have been charging at roughly 2.5C non-balance mode on my G3 VX pack Redshift, I really don't see a problem with it, unless I somehow started charging the two packs in series when one was charged already... but that is dangerous no matter the charge rate. I just need to get a list of things to buy before I get some of those 3s-to-6s balance adapters that hobbyking has... sort of a waste to ship one little thing from china.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens