The exhaust can is now fitted and it doesn't look that bad, at least it will do until I can get an intermediate pipe made for "version 2"

I originally intended to drill the side panel and feed the lambda sensor wire through. However, as I have said before, I don't anticipate having the sensor fitted all the time. Thus the cable can be secured on a P clip at the corner of the dash. I'll post a picture as soon as it's fitted this way.