I actually run 4s in my SV and run times I keep at 6-8min depending on what prop I use
I don't like to run my packs all the way down

i've done what SRT does, put bullets on and taped the packs together so i now have a 6s pack and a 4s pack, godd thing about it is i can add more packs if i want

quick update on bullets

if you get the ones with shrouds, drill the inside of the shroud to 1mm larger ( ie - 4mm bullet, 5mm drill bit) you wont get the heat shrink all the way on but you can get a bit on, i used 20mm heat shrink around the wire and shroud for extra grip to stop the bullets coming out 

Hello everyone, new to the forum.
i have a bit of experience with RC toys but every now and then there is an issue that you need expert opinion on.
i am having connectivity problem with the battery connector on my sons rc truck, usually i just switch the connectors to xt60 for ease of use, but this specific battery is a (Li-ion Fe) and the connector is strange a 6 hole connector which resembles a tamiya connector.
i have 2 similar trucks, the other one i already modded and changed the connector to xt60 to use with a 3s lipo i have, but this 2nd one i would like to use the stock (Li-ion Fe) it came with but just need to change the connector to a xt60, any advise about the wiring would be great, usually on batteries there is a negative and positive wire but as i explained above and as you can see in the picture this one has 6 pins so i am not sure which wire to solder to the xt60 and which ones will be useless to wrap in heatshrink
attached picture of the battery and its connector hxxps://ibb.co/1R7y9P0
thanks everyone