The Power Righter is designed for two people on a two-man boat, however, it works fine for me on the Taipan 4.9 as a single-hander.
Jeffifer on her T4.9 is much lighter than I am, so it might not work for her at the standard length. And the reason there is a "standard length" is due to shipping costs. The pole is the maximum length that will allow for reasonable shipping rates.
As the word goes, "... give me pole long enough and a place to stand and I can move the earth!"
So, if you want to solo right and do not have enough weight, add length to the pole. Perhaps you can find an old windsurfer mast that will sleeve inside or outside the righting pole and epoxy it in place.
Good luck,
Rick