Oh, another deal..on a couple of the 'botas here, bossman got me some aftermarket blades. Instead of a regular blade, they have a ring and use little flail blades, like on a hay mower. They work nice, spool up faster and are lighter than solid blades. Only caveat is, good clean primo turf only, they do not like mowing small sticks or hitting anthills, etc, they go dull fast that way.
Around here, what I mow is glorified pasture, so I like the regular solid blades better, but if you have nice lawn, they are a decent option. Dang if I can remember what they are called though, the maker. A pro turf shop might know.