Being in the mechanical and electrical field 40+ years, the 12 year old Tiger cub has seen its abuse. Our main problem has been with wheel motor supports that have been upgraded to 1/4".
It has held up pretty well. I had a go around with the engineer from Scag but all things considered this has been a tough mower and will continue to work it. The Kawasaki air cooled has help up well with regular maintenance. I'm the service person for all my sons mowers and I did like the Scag connection.