When I teach self-defense I use hardly any Aikido techniques. The length of the class I teach is ten weeks. I do focus on Aikido principles, expecially good posture, using strong voice and finding your center. The techniques I teach are much simpler, more devastating and don't require fine motor skills or a well developed center.
I find my training in SD an extension of my Aikido training. While I believe in least possible harm, I had to honestly evaulate my past as a woman and a survivor of rape and childhood abuse and find something that made me feel safer faster than Aikido could. This allowed me to relax into my Aikido training and become very strong as only long term training can do.