I don't use Julet cabling, I still use the older JST flat style connectors.Which controller do you use nealh? I know at the beginning of this thread you starting using an 36/48v dual controller. Thanks.
Originally I use the KT dual volt 6 fet 20a model but it now and then got hot and thermally cut out, when cooled down it worked again. I added a heat sink and 5v mini fans with a small 18650 2p battery which kept it cool.
For now I am staying with 36v and use a KT 9 fet 25a dual volt controller, it gives me more oomph in PAS1 & 2, only use higher PAS's for inclines.