Krastorio 2 Imersite Asteroids

Add more challenge to your game by postponing imersite mining on Nauvis until you mastered asteroid mining. This mod will lock the imersite drill behind the advanced tech card, and you'll need to bootstrap it by acquiring imersite while en route to Aquilo or traversing the asteroid belt (should you choose to install that mod).

Goals

Further adapt Krastorio 2 to the Space Age.

Means

This mod adds one more type of asteroid: the imersite one. This is a pre-Aquilo technology — the imersite asteroids could be encountered only in the asteroid belt between Aquilo and the inner
planets. It is highly recommended to also install the suggested "Asteroid Belt" mod, which will provide both more challenge and greater reward.

Further plans

Initially, I intended to remove the imersite drill completely. However, since Krastorio 2 (SO) allows synthesizing imersite out of matter, it no longer seems necessary.
Unless some other, obvious in hindsight, idea is suggested — I consider this mod to be done.