Yes, that would also be useful! I mean, you basically can get that information now anyway, but you have to keep going into test flight to see if you have enough fuel/battery/thrust, and then if (when) you don't, go back and edit it again, then rinse and repeat. Since it doesn't really change the balance of the game, it would just be a nice little convenience to help get into the actual action quicker by eliminating a lot of the repetition involved. So instead of build, test, build, test, build, test etc. it would be just build, test and (conditional) build if you don't like it after the test. 😃 And yes, I know it doesn't really have the whole physics simulation, but since you aren't actually trying to reach orbit here, it would actually carry a lot more information in a very simple package, since most of the values for these kinds of stats wouldn't change like they do in KSP, since we aren't dealing with atmospheric pressure, drag, lift, etc.