I'm very glad I've seen your many posts on the pro's and con's of the HRU216's SP unit - I was certain that being that every lawn contractor used them that they'd be super robust and the right mower for our property. But having read what you say about them I can see that while for lots of dead straight runs they might work well - for bends and turns etc they'd be terrible and likely die early. Happy to have avoided them, though the GXV160 engine is very good.