Recently a couple friends have purchased used MC Tournament Team boats - one with the 6.0l and one with the MCX. Apart from expected differences in propellers (the 6.0 had a jump prop on it), we've also noticed the slight difference in transmission ratio: the 6.0l apparently has a 1.22:1 and the MCX has a 1.26:1. Looking at the two MC's posted recently in the classifieds here, it's exactly the opposite: The 6.0l has the 1.26:1 and the MCX has the 1.22:1.  If the analogy fits, axle ratios on cars are much more coarse: 2.73, 3.08, 3.42, etc. In both cases, tire radius and propeller specs can be used for fine tuning. A 0.04 difference in ratio seems very, very small (almost insignificant?) to me. I'm also assuming both ratios are USAWS approved; I know they went from 1.5:1 to 1.26:1 in 2005 but when did the 1.22:1 appear and why? BTW I love that 190. If I was in the market for a boat, that would be very high on my list - if it didn't have that 6.0l. Then again, if that was your practice boat, everything would probably feel soft...