MU Arm/leg help! What's compatible?
 

Okay, just a few quick questions over some MU arm replacements.

I've done full on arm swaps by cracking torsos now, but just swapping em at the elbows is appealing to me more.

I've found with some work DCIH arms (old style) are compatible, but what else is? I'm looking for figures with the triple joint type. This also works for legs. Like I'm planning on using OMAC arms for a lot of different ideas, but I also need the perfect lower arms and lower legs for Academy X. Like X-23 and Pixie's in particular since they share the same for that part of the uniform.

What other lines have compatible lower limbs to that, and if you could, what should I look for to use for those two specificly? (Added plus if the hands are compatible to XMO Wolverine hands.)

I know previously Sentinel Prime used VvV scarlet for Pixie. But I'm unaware if she uses the tri-joint system on her arms. I know she does on her legs, so I'm leaning that much at least for the boots. DCIH doesn't have anything that I'm aware would work for the hands. Though arsenal comes close. OMAC arms work awesomely well for IM armor for pre-young stark/young tony stark's armor. Anyone else know what other lines are compatible to this tri-joint like system besides DCIH? (IE terminator for lower arms and lower legs, etc)

Sorry. I've swapped at the bicep on MU figures, but never the elbow so far.