Just make sure there's a pin hole on top of the balljoint. Basically adds to the width of your socket. Should work.

Well, the new balljoints with +rod hole attached and some of the grey placeholders usually work for me.

The swivel-click ones are not very stable when it comes to holding something upright.

Technic beam instead of lift arm?

How large, exactly?

Maxilos style always works well.

-=< >=-

Yanno we definitely need an picture of the MOC to do any good.

Throwbot bodies?

Many many rubber bands?

Heck, just make it a wearable MOC. Use your built-in assets to full advantage.

Technic turntable from Mazeka?

Try and figure this out?

Roa has said that the Av-matoran torsos work very well for her, since they have many connection points.

I suggest a bigger-scale Icarax connection point, but there are those gaps that don't look too good.

The titan-sized Mata Nui has a beautiful new hip-suspension style that uses pistons. I can't say for sure if it works and allows maximum poseability, and it's getting bashed a ridiculous amount for a robotic look (I myself don't see how it's much more robotic than the smaller Mata Nui's Metruwaist-Metruchestplate conglomeration), but if it is as good as it seems I'd suggest figuring out either that exact style or some variation on it. Surely even if it doesn't work there's a design out there that does, and you'd be the sort of person I'd expect to figure it out.

Those titan hand pieces with the bit thingy work quite well.

If you get the reaaaally tight ones, sometimes it's hard to even move them with your hands.

I'm sure you've tried that, though. I find it hard to believe that those wouldn't work.... o_O

-Laka