Not to mention the Catalyst chassis is one bad ass chassis IMO and don't see it ever becoming or carrying a 4s engine. Yes the 858 is having its issues but lets face it, what new releases don't? even in my business manufacturers will claim or have all these hours and hours of testing and when production hits there are issues and I've seen some where you just shake your head in disbelief and think WTF?, IMO the 600 is a very formidable engine for its size, the 858 once dialed in will be a real contender and who knows if they stay in or if someone else continues the Cat legacy brand we may see more in the 2s offering. The Catalyst chassis is quite the platform and still some room for refinement.