I've created a shipyard to allow me to colonize other planets to get more factories, but I'm finding it's taking a really long time to build the resources to be able to build a Colony Ship. I have a couple of outposts in neighboring sectors, but I only have small harvesters. With small harvesters gathering resources in all of my home solar system planets and a few outposts, I'm still only getting 1Ku/hour. Would it accelerate the harvesting to have multiple harvesters going to each planet?

Am I missing something, or is this how fast I can expect to mine and gather in this early phase?