Can we refund our Science Techs ?
hm, that's a little tough, e.g. if you have 10 stations already build and want to extract the tech, it will have to check a lot of things... maybe in the future.
Also, it's unrealistic, how can you reverse what you already reserached?
With commander CP you just extract it from your brain, it's like bio implants that you can re-use, but you lose some points in the extraction process.
Unrealistic? You are having a joke here right?
Had a look at your Replication techs lately? Black Holes and Time Travel, Steller Converters, Transporter Technology ... You want me to make a list!?
Anyhow, how about giving people the option of refunding Station Techs ... like Scanning, Cloaking, Shields&Weapons Upgrades .. and all the other associated stuff they thought they needed but now realise they wasted their CPs.