Started replacing the GBS supplied bolts with ‘ones that actually stay in place’. In case some else needs to change theirs they are: M4 x 0.7mm x 10mm. Buy ones with a 7mm hex head.

Cell #5 had been the bane of the pack for that last few weeks… Over temp/ under volt. All due bad contact on the terminal. Replaced with a 7mm hex bolt and torqued that down. Now it’s the happiest cell in the pack. Just 376 bolts to go – joy!