Has Anyone Ever Given Their Players The Construction Rules In A Mecha Game?

[Kallatari]

Instead of using the full GURPS Vehicles and GURPS Mecha rules from 3E that are really complicated for anyone who doesn't like a lot of math and spreadsheets, you can use the much simpler rules from 4E's GURPS Spaceships. Those rules are much easier for players to use.

You'll want GURPS Spaceships, GURPS Spaceships 4: Fighters, Carriers and Mecha (which introduces Mecha), Pyramid #3/40 - Vehicles article Mecha Operations which gives more mecha options and examples, and possibly useful but not needed Pyramid #3/34 Alternate GURPS article Alternate Vehicles which has a few more drivetrains and ground performance rules.

That I wouldn't mind giving to players to customize as it wouldn't drive me insane trying to proof read/approve the design, unlike trying to do so for something built with vehicles. I'd reserve 3E's GURPS Vehicles for things I built myself only, which defeats the purpose of sharing with the players.