Any advice? The instructions suck. The Bitubo spring looks really scrawny, but looks don't mean a damn thing, and the Bitubo is light, maybe I shoudl just dial in more preload being a fat old turd. Anybody know what the rating of the spring on a Bitubo for a TLR is, or how I can tell? I saw a really nice titanium rear spring the other day (drool). The Bitubo spring goes where the stock one does on a TLR, same linkage, so it should be about the same rate & preload we use on the stock spring-on-a-stick I'd imagine.