Thanks for the reply!
I did read that documentation before but it seemed like many people with good results ignored keeping the scale the same.
For example this vid:
https://vimeo.com/91709811
- container size was 100x3x30 in cm i assume... so his catamaran should be like 25cm big, however it still looks like its bigger than that.

But aside from that, if I scale my boat up from 2.5 -> 250 units, My container will need to be really large as well. However I doubt I can fill that large a container with mvs-.05 particles. So I'd have to increase mvs ..but wont that just make it the same droplet to boat proportions I have now? - just bigger?