Thank-you,HK,
I am a believer in "simple" and went through a very careful Vruzend assembly and had two failures (heat and out of balance stoppage) and do not wish to repeat.
The BMSs supplied worked well (I think) and if I do the larger pack, need similar assurance is all.
Seems I spend more time fixing than pleasuring, which is discouraging and time consuming.
Thanks again.