Go for it, I am sure that your aikido training will put you in good stead for aiki jujutsu. My teacher first came from a full contact jujutsu back ground and got to a very high level- he also went on to study aikido with many sensei's around the world and again reached a high level- then he went on to do an indepth study of pressure point (kyusho Jutsu) work. he now teaches a mix of aikido, aikijujutsu, and kyusho jutsu.
we study both classical aikido with nice movement and aiki jujutsu and pressure points within technique which is very direct and effective.
I think it would be a good thing for you to train in aiki jujutsu too- the founder of aikido, ueshiba sensei did too- so why not.
best wishes, Charlie.www.lonepineryu.co.uk