Hi All, 
Just had a Scorpion Exhaust fitted, and unfortunately it was a pain!! The mid pipe was straight and butted up against the rear diff.  The origional pipe has a bend in it to compensate for this. Luckily I took the Zed to Fastfit in Basingstoke who make their own custom exhausts, the technician there,Matt, made a plug out of thicker gauge steel and was able to get the exhaust all lined up!  What I thought was going to be a 30 min job took about 2 hrs!! 
Will E-mail Scorpion with my thoughts though. 
I know some of you have had Scorpions fitted with no problems, I suppose I'm just lucky!! 
Just glad I didn't decide to do it DIY, I would still be swearing at it now