Best PF + LA set up for heavy-duty articulated steering?

[andythenorth]

About to design some heavy duty articulated steering for this:

Untitled by andythenorth, on Flickr

Ignore the ball joint, that will go, replaced by proper articulation joint, this is a prototype. Front and rear units will be same outline, 1 L motor per wheel.

So to move the articulation joint:

- 1 LA or 2? Will two stay in sync? My 8043 excavator frequently gets one LA out of sync on the boom, which creates a torsion on the boom.

- big LAs or small? I like the small ones, but will they handle the load?

- which PF motor?

Or is a set up with racks or a crank better?

Wheel motors have one channel per side, which will aid steering (can counter-rotate).

Edited May 18, 2014 by andythenorth

[Bricktrain]

I would use one of these http://www.bricklink.com/catalogItem.asp?P=61905 to join a large LA with an M motor, should work well for what you want. If you need one to try give me a PM