Steve, do you have drawings for that pitch gauge, I know a guy, who does cad work, and another guy who does laser cutting,, just maybe,,,
as to a three blade on the la 46, the REAL secret that Pat and I,, along with a few others, found with the LA 46 is to prop it to run in the 9500 to 9800 range, with a good load. We experienced some consistancy issues with even wide blade 11.5 x 4 apc and other props , the magic for us happened with the APC 12.25 x 3.75. Jack I would really suggest you just make a longer set of gear, or run bigger wheels. Three blade CF props for you I think would be a less than desirable direction. Like has been mentioned, without a pitch gauge, and some experience balancing three blade props,, you are adding another niche tecnology to your learing curve. I think, my opinion only, that your learing may be more productive sticking with a known power combination and working on flying. Just my two cents worth,, hopefully no offence is taken by my comments,, I want to see you get up to do battle with Steve and I,, soon!!!