To add, most people I know of with a McLane have no idea how to backlap or adjust blade clearances. They leave it to the mower shops who save for one, grind off all of the relief and either set the blades too tight to be run without relief or zero contact. No relief and blades too tight=broken reel drive chains. Not to mention what this does to the leaf tips once the blades lose their sharpness after about an hour or so of use.
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