I like the idea of having increased length for underground pipes. However, I recalled it requires 10 pipes for one pipe joint when switching to underground. Having 200 space between one place to another is a little overkill especially if it requires only 20 pipes in total. I suggest if people want to make it over 200 spaces at max for every normal 10 spaces underground requires a underground block before it goes another 10 spaces and it automatically takes it out of your inventory if you make them. The cost of the block is 10 space pipes, 2 steel, and 1 copper wire. Otherwise it will go back above ground. Having a pipe go underground without the idea of adding supports is sort of a cheating way. Adding support for the pipes or have it compensate with extra cost based on the length of the underground I thought mike make it a little better. Just want to suggest adding it.