Oppose-Pinned Technic Bricks

angle-studtilt-180 partcount-total-4 size-4s-2s-4p

Technic Brick 1 x 4 Technic Pin with Friction Ridges

The Unofficial LEGO Advanced Building Techniques Guide

Didier Enjary ( 2007-02-11, brickshelf.com )

What makes a building technique to be advanced? There is no easy answer, advanced is just the way we, adults, feel some building techniques because they do not appeared, at least do not appeared widely, in the officials LEGO® building instructions.