When I place a miniloader, it always has the pile size overwritten to one, my guess is it has something to do with the source code, could you please add an option in the mods settings to change this?

Also, not sure why, but miniloaders cannot be replaced (with a higher tier, for example), you need to remove the current one and put the new one in two different steps, could you please fix that?

Miniloaders must use a stack size of 1 to produce lane balanced output when unloading. Nor does increasing stack size improve throughout due to how miniloaders work.

For the latter, this is in the documentation:

Miniloaders cannot be fast-replaced due to the invisible entities blocking
placement of the new entity.

Ok I understand, sorry to bother you

Although, I have to say the recipes with the ultimate belts mod are a little too expensive

It's no bother. :) I should mention that while you can't fast replace miniloaders by clicking with a different version, you can upgrade them using Klonan's Upgrade Planner mod, which can help.

funny, I have the upgrade planer 2 mod, by d3x0r, and cannot replace miniloaders with it either

I've only implemented compatibility with Klonan's version. I'll have a look at d3x0r's mod and see what it would take to add compatibility.

d3x0r recommends using Klonan's version BTW: https://forums.factorio.com/viewtopic.php?f=190&t=50975&start=20#p301366

Oh, thanks, I'll try Klonan's

It works just fine with Klonan's mod, thank you

funny thing, minioaders tier 8 (using ultimate belts mod) do no need power to work, I mean, they warn you about the lack of power, however, they still work without it

The Ultimate Belts loaders will work with containers without power, but still need power to transfer to or from cargo wagons. They also don't work with circuit controls.