I just saw this video recently and feel his quad is reminiscent of these "kaveman quads" lol

(17-Apr-2020, 04:33 PM)MrTrendizzle Wrote: Would i do that by just leaving the drone in GPS mode and sit it in the garden until it lands then plug straight in to my charger and check the balance of the cells? So they all ready 3.x across each one yes?

I've done some Frankenstein type adjustments to my drone. I've swapped the legs with some sponge (Make up sponge egg type things) so if the drone comes down hard the sponge absorbs most of the energy and prevents the drone from bouncing and flipping over shattering the arms/blades.

It actually works pretty well and the weight has been shaved by 2g which is a bonus.

Basically yes.  As long as your charger shows the individual cell voltage.  Then check again every ten minutes until the pack cools off and note the difference.  The cells will recover some voltage while cooling, if one of them is a lot different than the others you could have a weak cell.  

Another way to tell is to charge the pack fully and then compare IR(internal resistance) between the cells if your charger has that feature, you are looking for a cell that is way off from the others.  And again, check cell voltage every ten minutes for about an hour and see if one cell doesn't stay at fully charged voltage.