Did you utilise the lens tilt facility of the SL 66 for this shot. I used to find it somewhat physically limited with short focal length optics. Best 6x6 camera ever!
My FAV camera --- reversing lens for close-up ---drop bed for focus ...revolving prism ---I went to the factory in Germany ....Even had a repair spot near by to fix the rail or winding gear ....

B Weston got me into my first one ....