You mean aside from slapping together a G1 friction socket, a straight axel/axel connector, a two and three peg long axel, and two loose ball joints, one of the more recent design and the other the original?
Speaking of which, I recently came up with a somewhat custom head design for a MoC I've been working on, and I figured I'd share it since I personally haven't seen it anywhere else. It's relatively simple, and really only consists of six pieces, so all of you shouldn't have much of an issue building it without pictures.
What you'll need:
An HF 2.0 head - not the cap or visor/goggle attachment, just the head.
One pneumatic T-bar, a.k.a. that one piece used to connect Hydraxon's fingers.
One system clip; the one that resembles minifigure hands.
One HF Brain Attack Visor.**
One translucent Bohrok eye.**
And one of Hydraxon's claw tips from said fingers.***
** Should be the same color/shade.
*** Should be a color similar to the translucent pieces or the actual head in question.
How To Build
- Stick the perpendicular end of the T-bar in the hole farthest away from the face of the HF head.
- Rotate one of the parallel ends towards the opposite corner temple of the side you're plannning to build off of. Left side = right temple, and vice versa.
- Insert the peg side of the claw tip into the axel hole of the visor so that its directly next to and pointing towards the clip segment on the interior.
- Attach the visor normally to the end of the T-bar closest to the face as if building one of the original figures, but adjust if necessary so that the edge of the face shield rests somewhere between the edges of the nose and eye.
- Attach the system clip to the other end of the T-bar, stick its bar through the axel hole of the Bohrok eye (curved side facing up), and adjust so the tip is pointing down towards the neck socket.
If you're reading this far and you've built it correctly, you should now have a custom-ish head, complete with bangs and ponytail, for use on your future MoCs. Granted, the side you didn't build off of and the portion that the visor doesn't cover will appear to have been shaven, but hey, it adds character.