Hi Keith, I will be fitting the pieces you mention tomorrow so the next pictures will show what you need to know. The red one goes behind the other small piece and the top part will be welded to the inner post, the area with holes in it and tabs to grip the stuff the tin tacks are hammered into for the trimming. The pictures will help. This is just my interpretation of what needs to be done and I have done the same thing 3 different ways with only small detail differences. Yes the upstand should butt to the inner wing arch but I wont know how close I've got it until I drill through. If its close I will pop rivet x 2 but if a gap will opt for self tappers.