Yeah, that sounds right. It really IS that simple, hahah! But that’s not where it ends, depending on what you want to do with it the infill etc will be important.
I actually just set up my hub today, I’m printing clear PLA (which is highest purity as PLA is naturally clear) and I’m looking for reviews. So if you want to run your STL via my hub I’d be honoured! I’ll help choose the best infill and wall thicknesses for your particular use too. I’ve not actually got a feel for the pricing yet but if it feels too pricy let me know and I’ll see if I can bring it down a bit for you
I’m in Edinburgh, Scotland, so that may be a factor when deciding.
Anyway, its an open offer, let me know!
From memory default first print price is £4 minimum to cover the startup costs.