I'm looking at the LEAD CNC machines for bass guitar construction. I noticed that the 1515 is a bit more expensive than I figured it would be as compared to the 1010, then I noticed that it has a sort of double gantry which might explain the price difference. Is that because the gantry is that much longer and therefore subject to flex? I ask because I don't need a long gantry, even though I'd like one dimension of the build area to be 48" so that I can future proof for neck through bass guitars when I get to that point (I'm building bolt on neck basses now as I work out all the design details). In fact, I don't even need a gantry as long as the 1010, I could get away with a 16 x 48 build area. 24 x 48 is a good compromise for my shop space, that's the size of what I have now. So, are there other differences between the 1515 and the 1010 I should be aware of? Because if I don't need the double gantry, it would be nice to extend the rails and table of the 1010 to create a "side loader" LEAD CNC that meets my needs. What would be involved with this and would I end up with a price penalty for swapping out the appropriate parts (other than the slightly greater price of the longer rails and screws)? Thanks in advance for any help!