can’t do ‘string method’ wheel alignment

i’m kind of stuck right now, so any suggestions would appreciated. I followed this other thread from a few years ago, how to align the front wheels using string How to set wheel alignment. "Now with pictures!"

but i can’t get the rear wheels to touch the string on the front part of the rim before the string hits the front tire (on both sides). I am the last post on that thread, tried to explain it a little more. beers on me if someone can help me get this done so i can ride this weekend — otherwise i take it to the shop with the bolts already loose and ready to be adjusted, and lose my pride.