@NormK, yeah I don't understand it - get in arguments with clowns on Whirlpool forums who say they've changed their mower's oil twice in 20yrs, claim it runs great and on this flawed basis assert that anyone who does normal maintenance on their gear is naive. Go figure.

The HE660's RRP runs a tad under $6500 these days. So not cheap.

Any point trying to get a kevlar version of the drive belt (seems to be an A33)? Or just go with your bog standard rubber version?