Here at CEATEC, we bumped into these folks who kindly offered to strap us onto their latest prototype arm -- a slightly smaller variant of the one installed on Cyberdyne's current suit.
Additionally, a sensory pad was applied onto our forearm's medial cutaneous nerve (around the elbow area) to pick up our muscular nerve signal -- similarly, Cyberdyne's lower-body exosuit requires two sensors on each leg.