I'm about to buy a new 12" coumpound Miter saw and I think I want the Hitachi Dual sliding 12". Here is the question. There are 3 listed that all look alike but different Model# FDH #LCH # LSH range from 200.00 to 500.00. Can anybody shed any light on these different Model #s. I think the L stands for laser guide but don't really know. Thanks.