Hi all. I am the original poster of this thread. This weekend I made 3 jumps, talked to a number of people, had my canopy jumped and inspected. This is what: I was able to control the spinning after opening all three times by following the recommendations on the replies to my post. Most problems were resolved by a good body position during opening. The other thing is that I had different kinds of rubber bands on my bag, including regular bands, colored ones and tube stoes. According to a rigger friend who jumped it, this was causing non-symmetrical openings and possibly causing line twists and off-heading openings. It´s been all taken care of now. I again want to thank everyone who contributed by posting your ideas.
M. Gobbi