NXTguy53

No, they all unlock at the same time. And anyway money hasn't been implemented.

It is just me, or is the new liquid fuel booster added in the latest update completely broken? The problem I'm seeing with it is what happens when you compare it with a mainsail. it has both better Isp and thrust than the mainsail, and is the same part size. It's also smaller than a mainsail stuck on a big orange tank. And since the mainsail is pretty much only used in conjunction with the big orange tank, you can just switch all mainsails on a launch stage for liquid boosters and literally make it better in every way possible. I really don't know how to fix this, maybe a thing where you can only attach the liquid fuel booster laterally onto one of the new tanks? Tell me what you think.