I have the LR32 kit with a 1400 mm rail. I am in the process of building some built-ins. The shelves will be 75" tall and I'm not sure which rail I should purchase. I am on the fence about buying another 1400mm rail and trying to make a simple jig to let me connect 2-1400mm rails together (Unfortunately, the new end stops are not available in the US, so I'm not totally sure how I could do this). Or I could purchase the longer 2424mm and not worry about connecting two rails. Aside from the cost, what are the advantages of purchasing the 2424? I already a 1900mm for crosscutting 4x8 sheets. TIA