I did a lot of aid practice at Crow Hill alone. At that time, nobody was aid climbing in the NE, and I wanted to learn, so I struck out on my own. I did the 1st ascent of Jane aid-solo, in the Winter, as I remember.
Just take care, at the bottom, to prevent a ground fall. I've seen quite a few climbers solo the Mordor Wall. All that practice paid off big time when I first went to Yosemite, back in 1971.
My first big wall there, I did solo, since I couldn't find any partners. Nobody knew me, the weather stunk, and I was impatient to get on a wall. Have fun.