Apparently Heighway is having big money problems, pretty much about to go under so the investors steped in, are changing leadership (no more Andrew) and are pumping more cash in. Worth reading if your in or are considering buying Aliens, so you can consider your options...
https://pinside.com/pinball/forum/topic/rebirth-of-heighway-pinball
https://pinside.com/pinball/forum/topic/rebirth-of-heighway-pinball