Ok guys, normal finned heatsink for a smooth can neu :)
It is 1515 1.5d 2700kV in Emaxx, MMM on 6s2p a123 cells. Gearing 21/68, overall about 16:1 as far as I remember internal of #3905 emaxx. Weight by 5kg.
On sunny day (30deg centigrade), whenn killing my batteries Neu gets quite hot, I would like it to live as long as possible and drive without cooling brakes other than changing batteries :)