Well, it will be interesting to see how well you will get those tire/wheel combos under your rear fenders.
I have seen one 914 with 7x16 Fuchs and 195/45/16 tires and there where nearly no space between tire and fender lip. There were no chance to use any wider tires.
I look forward to see pics after you have done that bat method. I didnīt dare to do it myself. I know many have done it there, but .... Well, I hope you managed to do it and fit those tires and wheels under the fenders. Good luck and be careful not to destroy that shiny black paint. You seems to have very nice car.