Planning on buying >this< and upgrading the internals as I go on. I read >this< and I know what parts to get, I just don't know WHAT do get, as I have no experience in buying upgrades. If you don't want to look at the thread, he says it needs a piston head and cylinder, long motor, wiring, and 8mm bushings. I'm looking to spend low on these parts, but not low enough to where I'm obviously missing out on something better. Does anyone have any recommendations as far as these parts go?