Instead of having to choose and pay for an entire engine on a ship and lose all credits on the engines if you are not happy with it.. Why not allow the user to purchase what he/she feels they need to make the engine function they way the would like for a fraction of the cost of changing and trying engines after engines to still not give what we need..

Example: 18000 credits for an CL enigne Heavy (light, normal ....)

Allow a few selections of modifications ( 10% more HP, or 5 sec more overheat, or top end vs accleleration ect.) Something like that which we could purchase as an add on (instead of an entire new engine)

I can add 5 sec more to overheat on my engine for 5000 credits
I can have my ship speed burst of 10 knotts faster for 10000 credits ect..

Cause I do not know what effect exactly my crew supports will have for sure and if I can upgrade for a fee it would be easier to know and or change more cost effectively when playing differnet games modes which may need slightly different modification with out the heavy cost of chaning engines back and forth, or having to just settle and not be happy....

Just a thought!!!