People are not made to bend double, especially older people, but Wobble was out teaching people how to sail so I had to put in another four stringers by myself.
What seems to work for me is to cut everything to plan dimensions and then get into the boat and do a bit f cutting and sanding until they fit nice. It's important to label each part "Forward", "Up" and "Left" and "Right". I almost glassed in something back to front, and my labels saved me just in time. here they are.
P.S. Before I put those stringers in, and considering I had all the frames in, I decided to lift the boat... Man! It's rigid!