I have a 2008 kit that I finished in 2009. I did the SB 14-8-29 in 2014. I also monitor the SB 19-09-09 and have no issues. I am changing out my 540 soon and wondering if I should be upgrading the mount and nose gear. If that was a good idea, it would be the easiest at engine swap. I can't see how I would notice any difference with one over the other so I am thinking that is a pointless project. Those that have flown both, do you notice anything different?