@OpenSky and @davek79 are you going the 18650 route as well ?
I did a quick calculation in regards to having a solution for putting and holding the cells together, and I’ve come to the solution that for larger packs it may already be more cost-effective to invest in a spot welder, instead of buying the pricier vruzend caps with integrated connectors.
this solution here: https://www.youtube.com/watch?v=CNmvx2JSCvA
costs around 100 euros plus a 12V car battery.
it can be purchased here: https://malectrics.eu/