Jaguar3

Looking at it it appears there are two rows of 3 batteries, with one row accessable from each side of the box. I love the coaster Mark( Although your pictures need some work ;-) ) , shame it would take a monstrous amount of treads to do a full blown coaster though. Also, any info on interfacing the remote with the NXT?

Sales taxes in the US vary state by state, some states don't have any, in most states its only 6-7% that hardley makes up the differance in the price.