No can do, weight issues and it's a hell of a big bar :twisted:

Looks like it's hollow shaft time, shouldn't be too much of a deal to build in - just a couple of alterations to the weapon mounting which still only exists on CAD.

Then again, I might just try and run the design past the organisers and if so go with the original plan... I can name at least one robot with a much dodgier link placement than mine would be!