Found a bit of a crash bug, but only in SMP and i have only tried on a MCPC server jar, haven't tried a vanilla server jar yet. but any time you try to break a carriage or a motor you get this crash or if you have the motor move the carriage blocks you get this crash. it just boots you back to server selection and shows you a screen that says "Internal Server Error"
this log file is too large for non pro version of paste bin, and i didn't want to do the wall of log file thing so, Log File its a short error that starts on line 5239
and that's about all i can think of atm, hats off to ya for making this mod it will be nice to have a mining ship back.