A few months ago, we featured a LEGO Ghostbusters Firehouse Headquarters MOC by Sergio Herencias which is inspired by Brent Waller’s version. Sergio has emailed me and said that he has updated the interiors of the firehouse with many details from the Ghostbusters movies including Egon’s lab, recreation area, and the containment unit/storage facility/protection grid. The MOC has 5,704 LEGO pieces so if you think you have enough parts, Sergio has kindly provided the LDD file on his website for free. You can also check out all the firehouse’s new details and features on the same page.
Also, the first version of Sergio’s Ghostbusters Firehouse Headquarters is currently on LEGO Ideas and has garnered 3,105 supporters as of this writing so if you want to give your support on the project, you can head over there and do so.