Hey there!
Love your mod and how it makes trains behave more naturally and saves my immersion from breaking :P
I'm currently trying it out with the Freight Forward modpack which includes some mechanics around trains and ships having /10 storage (Klonan's mini trains are added with only 2 stacks per wagon and regular trains are pushed further down with 4 slots, and cargo ships with 100 slots), with the intention to encourage stuffing materials into containers (deadlock crating) rather than direct loading.
I noticed your mod makes loco and wagon weights to 10x which I find great, but the mod setting for per stack weight (kg) is set to 250 by default. I was trying to to increase it to 2500 but the setting doesn't allow values more than 1000.
So here's the suggestion: Instead of having absolute stack weights, would be great if you can set per-stack weight = (base wagon weight / no. of slots) for all registered wagon prototypes, in a more relative fashion - at least at default and set that into mod settings for people to tweak. This would still output 250 for (10000/40) or (5000/20) in normal game scenarios and scale with modded trains and ships. You can also allow bigger values for per-stack weight for the masochists out there :)
What do you think?