So I'm pretty new to this and kneel before those who came before me.

I'm using a FlashForge Adventurer Pro 3 and the FlashPrint software. I do fine creating single items, but when I want to do something that requires multiple pieces to be printed and then assembled I don't know how to make them fit correct proportions. Like I'll have a leg to a machine but then the socket it supposed to fit into wants to print bigger than the leg itself. So far I haven't found a way around this except to eye ball it, which is extremely inefficient.

Advice? Another program? Something I'm missing?

Thank you so much in advance!