The news of the new designs for exoskeleton suits made it down to the weapons lab well before their tour group did, and the teams that weren't engaged in anything urgent were already reviewing the designs and altering them to accommodate the robotic tools that the lab already used.
There was no need to reinvent a tool they already used, they just needed to mount it to the auxiliary arms, which could be the same as what the workstations already had. Being mounted to the user on a highly mobile exoskeleton would give an incredible deal of Versatility and allow them to work in groups around a single station.
The actual frame and the main arms were the responsibility of the structural lab, but the weapon lab was eager to get the additional limbs functional so that they could send them for testing and begin using them as soon as possible.