with my Mk3 GT6 I had a new screen from Rimmer's and used two auto windscreen companies neither could fit the screen, when I was left looking at the new screen and measuring I found that both bottom corners had the wrong radius, so i made a template of my old screen, stuck it on the new one, and used my diamond files ( for sharpening my chisels ) to redress the new screen , I found an old guy, a semi retired wind screen fitter, I got a COH Bains new seal, I think it took him half an hour. job done, And my car has had a new windscreen surround and a roof repair panel fitted