My first step was to add a fourth player. A big help with this was addition of female characters to the Kerbal Space Program. Now I felt that I could make the Kermans the additional player. I split the science fiction space program off from the Kerbal program (the SF astronauts from the Kerbal equipment). Now the Kerbal equipment has Kebalnauts, and the SF astronauts have pieces of equipment from different television shows and movies. I had the new card sets printed on linen stock as my earlier cards sets were.
You can find the complete set of cards here:
The game board also needed tweaking - I had found a few mistakes, and I also wanted the year spaces to have both a first and second half since that is usually how we play it. I then had the board professionally printed and laminated.
The board is here: Deluxe Liftoff! Board.
With the addition of the fourth player and the updating of the board, I also needed new markers. These were printed on sticker paper and mounted on wooden tiles.
Liftoff! R&D Markers.
For ease of play I designed play mats. These have spaces for each launch facility, purchased components, and a player's current astronaut corp. These I also had printed and laminated.
Liftoff! Player Mat
Then there where all the little things: a new plastic storage box for all the markers and Lego pieces, dice for each player in matching colors, storage for cards and money, and a custom game box. I already had the money printed, Event and US/USSR card sets, Mission Event book (Failure Tables), and Lego parts.
For those of you who have a copy of Liftoff!, feel free to add any and all of these components to tweak your game. One of the reasons that I don't include the files for the Mission Event Book (Failure Tables), is that these are a key component of the game along with the rule book; and since Liftoff! is still available from Mr. Bronner, those of you who want to play the game will need to purchase a copy from him first. A good way to contact him is through Boardgamegeek.