hey there... all of the ultra mbx/lx oneparts are interchangeable, I have a franken ofna buggy that I built out of a violator, an mbx, and an lx one.

MBXchassis and upperdeck and center diff
LX Onearms and steering f/r diffs
Violator motor mounts and wing brace

it is hard to see but in the last pictures outside, you can see the slightly different shades of blue aluminum, the lighter blue is MBX parts, the darker is Ultra parts. they will all work together, with the excepton of the front brace setup, it has to be from the MBX, and not from an lx. that was thoe only main difference I found was tthe placement of the front brace, and the LX chassis has some additional holes drilled into the bottom.

what parts do you need? I have a ton of spares, and even some aluminums ones.

Also I would recommend swapping the MBX arms to the Ultra LX one arms and steering knuckles. Ihave all the parts to do it if you are interested.

Ialso have a crapload of new ofna parts that I have no idea what I am going to do with. if you can find a part number let me know it. Also if you happen to decide to stay with the MBX setup I do have a spare set of the plastic steering knuckles however I highly recommend just changing out your a-arms and getting the aluminum knuickles for the LX one.

PM me if you need more info, or want more pics.