race890 - Sherwood is on series run "K" at this time, I know they had C, D, E, F, G series as well. I would venture to say they have knocked out the problems, but they took a lot crap in the process. I think they learned a valued lesson from it. your call. I still use one and it does the job well. The 2nd stage is bomb proof. I put a SR1 second stage on a Maximus first stage and it was SHWEET! Hope this helps. Do your research B4 you buy!