Great to hear it is riding better. Sounds like you are on the right track.

As for cast vs steel spindles...since the front weight is so light, I would think cast "should" be fine, but I have always gone with steel "just in case". Please dont take my word for it as I wouldnt want the worries if either were to break (my attorney made me say that)...lol.

Aldan will work with you as I know from first hand experience. Simply measure the shock and spring length/diameter and they will know where to go from here.

Let me know if I can help anymore.