Tom,
Now if I can figure out where the center line of the Impact is...
Exactly[:@]
I'm not sure if this is the best way to do it but I have set the fuselage on my workbench and propped up the tail end so that the nose ring of the fuselage (i.e. what you would align the spinner back plate to) is at 90 degrees to the bench. I assumed that would simulate the model in 'level flight' - the fuz also looks quite 'level' like this.
Next, I measured from the workbench to the flat part of the fuselage where the cowl fits. This was 216mm (I have the U/C on it!). I drew a line along the entire length of the fuselage at a height of 216mm from the workbench and assumed this would now be my 0 degrees datum reference for everything else.
As the datum was parallel to the workbench I set up the GP laser level to be 0 degrees when sitting on the bench, transferred it to my stab and it read 1 degrees [

]
Now this is when I get dumb and lose the plot!! What I don't understand is this. With the stab at 1 degrees I guess I would need to file the anti rotation pin holes until the stab sat at 0 degrees?? BUT, if I alter the height of the fuselage slightly at the tail - maybe only by 1/2", the level sits at 0 degrees - so voila the stab is at 0 degrees with no filing/sanding?! So, how do I know what is right?? Are the stab pin indentations correct and my way of levelling the fuz wrong or is my levelling spot on but the stab pin holes way out???
I don't know if that made any sense or if you see what I'm getting at. The wife has shouted at me for getting so wound up with it

[&:]
Rgds,
Mark