Jerry, I hope to see you in Monterey so we may adjust the tequila supply/inbalance problem I have been hearing so much about as of late. This needs attention and better sooner than later! That said, I will probably modify the masthead casting to fit whatever I end up using.
I am not adverse to fixed spreaders but I just want an inherently stiffer section. I have never been impressed with the MacGregor section. It is FINE for the std. rig, in fact very good, but when it gets that little bit longer it seems too noodly for a masthead rig.
I think it is the, for lack of the proper term, the die shape (teardrop) of the section that gives it the characteristics. I have the BEST fabricator/welder  as a friend here in town so mods are no problem.
As to who triumphs over whom-the arena will show the results. (you are probably correct, as my Reggies (short rig sails- OEM* and proud) are tired. I refuse to put new 'short' sails on the boat. Stubborn opinionated (CheaP) ol' me.
In tall rig mode I will prevail!
If you have the time at Bob's shop on Monday, I would be most appreciative for some figures so I may arrive at the ultimate-
EXTRUSION CONCLUSION.
Life is Good
Gary O.
M-17 # 316A #4 name game-???

C-21 Arizona Foothills
602 943-7252 Office
602 703-7245 Mobile
800 528-8962 Toll Free
www.GaryOberbeck.com

"Quality is never an accident; it is always the result of high
intention, sincere effort, intelligent direction and skillful
execution; it represents the wise choice of many alternatives."
                                      -William A. Foster

* OEM = Old,Exhausted,Moldy