Got to playing w/ Incin again, and noticed that if you bend his kness past a certain point, the lower leg pops off. Well, I found the interfering bits and shaved them off, giving the ability to bend his legs beyond 90degs, as shown.
EDIT- apparently you can click the piic for a slightly larger version.)
Also, I trimmed the material around his foot/ankle, around the long blue part that starts as his heel and runs forward into the front of his foot, where the swivel is. Trimmed a little material down there and now he can rotate his ankle forwardpast 90degs as well, as shown.
A couple simple little steps to give him much improved articulation and kick-ass-posing-ocity. Caveat: while the alt mode is structurally uneffected, the ankle rotation mod does open up a gap in his alt mode side panel, where the bit of blue shows thru the dark gray lower half behind and beneath the cockpit. Paint the newly-exposed blue part black and it'll look like a vent.
Again, more pics later w/ a better camera.