Let me explain why the crafting time is too high at the moment:

The main use of circuits are crafting moduls:

Crafting a Tier 3 Modul requieres 915 Electronic circuit, 175 Advanced circuit and 25 Processing Unit.
A good ratio of assembly machines are 5:15:4 (Electronic circuit:Advanced circuit ...

In my Opinion collisiondamage seems a bit too high. Especially for low speed.
It is even possible to get collisionsdamage while standing for a wall and accelerating.

So i suggest: Collisiondamage should be proportional v^2. Because kinetic energy is equal to v^2. This makes damagecalculation more ...