I have found that anything over 7 blades on a reel is no good for zoysia. Even the 10 blade McLane and Tru-Cut that people buy thinking more is better proves to be otherwise. 10 blade mowers are for bent grass or bermuda maintained at less than 1/2".
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738