Bill,

I scanned a page from the August 2000 copy of the AMA magazine. In that article the author describes a 2 chamber design. he seems to indicate that the ratios between the chamber length as being critical to the design. I was unable to save a copy of the scan (pdf format) in my gallery. Let me know if you'd like a copy emailed to you. This might be information tha could be incorporated into a two-part Pitts design.....one more avenue to explore...