Thanks for the links Tony. I will see if his budget will stretch to aftermarket bits.
Rick. Your advice about more dry fitting I have taken on board. The way the build had gone up to that point had lulled me into a false sense of complacency!
My commission has not seen the first Typhoon attempt, but I had previously built him a Fly Wessex (much dry fitting needed on that one!) as he used to operate this type during his RAF career. His late father flew Typhoons and Tempest Vs during the war, which is why he would like a model of his dad's Tiffie. I am honoured to do this and so want to do a good job.