It is yes, but the early twingate manifolds (of which I think there were only 2 were made, my own and Daves) weren't made as a kit, ie a downpipe/midpipe wasn't made to go with them. The manifold design was changed slightly when they started being made as kits so a DP/MP from a "kit" manifold wont neccessarily fit the 2 early manifolds. Robs one should have had a dedicated DP/MP made for it.
Plus there are other factors to, I'm pretty sure that DP/MP was made to fit with a Precision turbo. These are different to the Borg Warner turbos which Rob is using which will also throw the DP/MP out.
So basically Rob is using a DP/MP that wasn't made to fit the manifold or turbo.