I've looked into it. I'm not opposed to adding loaders for Krastorio's belt tiers.
Krastorio does have loaders of its own, though. Is the interest a vanilla-style graphic? Because I'm also amenable to just reskinning those, and in fact that's my preference. So if your interest is just vanilla-style graphics, that would be how I would go about this.
Loaders by default do not work with trains. Vanilla Loaders HD and Loader Redux work with trains via scripting in control.lua that has high UPS cost. VHD: Krastorio just reskins the Krastorio loaders that already exist. If you want those loaders to work with Trains I'd suggest asking the Krastorio devs to implement that support.
