Slap !!!!! Wow !!!! I didn`t see that one coming. I guess I set myself up for it though. But before we close this dialog box for good let`s do a little review. Being new to the 2-cycle /engine conversion hobby, I was acutely aware of my lack of knowledge regarding parts and material availability, and procedures designed to improve upon the various manufactures offerings. I joined this forum in an attempt to expand this knowledge as well as to accelerate the process. I submitted a thread requesting ideas and information on Ryobi engine modifications. You had every opportunity to pass on this post if you felt your knowledge was proprietary. Instead you posted up and directed me to a web page of your design containing a lot of neat stuff dealing with this subject. Many of the procedures you outlined in the tutorial were well beyond my capabilities and experience level at this time, but I felt a few were within my reach. You were very detail orientated in several of the procedures presented, giving up both material composition as well as the donor source, ie (the rotor came from a Noki 30cc gas engine). With that in mind I held no concerns regarding how altruistic your motives might be. I naively thought that you genuinely wanted to help some one just getting started in this hobby but all that has happened here is that I have given you a forum to flaunt your superior knowledge. I am positive that you didn`t invent the reed valve concept or develop the metallurgy needed to build these springy little objects. You learned of their existence and application somewhere, just as I am trying to do. The grey matter shot was a cheap one, not normally associated with someone of your capabilities and intelligence.