I'm thinking different track pitch=different drivers, that's why it's a 154 instead of a 151 isn't it?Isn't it just an easy track swap? Drivers should be the same, at least I hope so! I just finished a drop and roll and got a 154" off a XP.
Thanks for the info guys, I guess my choices are change drivers or put my 159" track and get rail/tunnel extensions. At least I have a few days to get her done.