Could you post pictures of your work? Are you saying, you get more run time by connecting on the other side of the board like in the picture I posted? I was also thinking maybe connecting to both sides with a diode on the lead going directly to the pack side negative so you wouldn't back feed and have the Inspire 1 turn on as soon as you insert the battery and still have your auxiliary battery work in case of Inspire battery shutdown, does that seem like a doable theory, If some could figure out the specs of a diode to use I would try it. I posted a second picture of what I'm suggesting.I have succesfully achieved 33mins of flight time and possibility to go higher but there are some issues.
First of all, not possible with DJI props. 14x4.8 T-Motor needs to be mounted on... and also adapters which are not easily available around.
Secondly, building the battery costs a little much; around the same amount as 2 x TB48 cost. I still not decided is it going to be logical to make a battery costs that much compared to having 2 seperate TB48s which can offer around 22+22mins total.
Cells being used needs to be having the same capacity and inner resistance to give you the best flight time, also they need to be connected directly cell to cell to create 6s3p config. That is the keypoint.
I have designed a new battery case easier for everyone to use. Can be mounted directly to AC slot and can be charged directly from original charger...