On a red-head 600 would reed spacers and a boost bottle play nice together? I'm not sure if I've seen them combined before. The http://www.hauckpowersportsinc.com/pages/CustomCatalog/Product/1884 Hauck boost bottle says it comes with spacers but I'm not sure if those are to make the boots work with the carbs.
yes the spacers that they are referring to are to fit your carbs to the boot as the boots are phazer boots and are bigger. The spacers make them fit your smaller carbs. I have had a few of those boost bottles and couldnt find any power gain with them, i would use a set of reed spacers, youll get better throttle response.