This is the 2018 booster design, with now 66.2 meters high.
Its a 3-part assembly, clip engine and BFS connector pins/wires, glue the engine.
THe top connector is a pressure fit, you can use it to rest the BFS on top.
Both ship and booster before launch will be at 118 meters.
Grab the ship here: http://shpws.me/QIBO
Have fun and enjoy the detailed model!
