a copper strip soldered across the ends of all the series strings is used to handle the higher current.

Or solder your main power wire to each series connection, but using a copper strip is prob. neater and keeps the pack flatter.

With a copper parallel buss on the first & last group it is still appears best not to have the discharge wiring on the last cell but nearer the middle or a pair of wires culminating in to one.

From browsing many pages on ES the concensus is the best layout is a uniform block one with even number cells in parallel for best conductivity between cells.

 

For odd #cells like 5p you are best probably sticking to conventional series connection with one on each cell or for better uniformity use a single piece nickel plate covering all 10 cells in each series group.

 

6P then, I can't see the logic behind that choice however. 0.2C peak will be very kind to the battery however. Like I said ES is often pushing things to the extreme limits.

I'm liking this "fine tuning" of battery construction thing, but like you say AK, some of it is prob. unnecessary for low power application, but all good stuff to learn.