First post here, HI, Just bought a 1989- 1818 and assumed bucket would float but lever does not seem to offer it. I checked inside and the valve throw seems to be all the way, but no detent hold or coast down. Only power down all the way. Are there more than one kind of spool to use or can I add it to existing valve assy. I guess I thought that was a for sure function. Thoughts? sjg