I am curious about what implementation you'll come up with for keycapless design, but from my end it sounds like you're using terms interchangeably without understanding them. AFAIK, travel is related to switches but you're talking about it in the same breath as case design, so the overall idea comes across as somewhat confusing.

Good luck with the project though!

If you're planning a project and looking for community input, why would you not advertise what you're actually making? All I can gather is that you're planning a 60% board without keycaps, which just sounds like a troll.