In my experience, the rolling bass is used often, but is definitely not a requirement.
When I first read this post and was talking to @nickyhavey about what psytrance really was (it's not easy when you're not a producer to use the exact words) I bumped into this site that actually gives a good rundown of the styles, although it uses a different vocabulary than the one I'm used to.
I see you've posted your track below. Curious to hear the end result :0)