Wasn't happy w/ ABS plumber's cement, used too much and melted the bricks. Ordinary Chinese superglue works pretty well on the bricks - 2-part epoxy works well gluing the MOC to a separate object, as the epoxy fills the remaining voids.
Steel threaded rods from the hardware store, coated w/ the Kragle work well as reinforcement running through Technic brick holes.
Any other tips, or just facepalm memes?