Suggested

Notification wanted

Would be helpful if there was a notification whenever there's an applicant for engine usage. In the past only accidentally (and pretty late, I guess) I realized when someone wanted my engine.

Hey old friend. We need to be careful with this. As could become rather spammy. 

Maybe a [1] for an application outstanding on Car design engine button. But it removes if there is no pending applications.

Hi David!  :o)

Yes, that would be helpful! No matter what kind of, any sign would be appreciated. My personal favourite would be that after login the screen starts blinking while Dixieland or a Polka is being played, hehe  ;o)

Invalid reason as we already have a notification system that works just perfect. There's absolutely no reason to not add a notification and it's 100% needed. once your engines are full just make it so you can't send any more to that specific person. It's very easy to implement.