I got a cheep, cheep 4300 and I thought that I'd strip it for parts. I had no idea what a 4300 was other than a brand-name bike so the parts must be OK to use on other projects. Well, the thing LOOKS like a big BMX bike with gears so I said to myself (with three other entry-level MTBs) let's build it up and ride it like a big BMX bike and see what happens. Well, in expenditures, now about 1/2 way to the cost of a brand spanking new 4300 and I'm not nearly done yet. Sure, the components will be a step or two up from stock when I get done and the MAIN point of the build is the experience of the build but I'm starting to wonder if I am throwing good money after bad. I also have a HUGE M500 frame that I was saving for another project. Would I be better off putting my shiny new bits on THAT and calling it a day or will the 4300 frame hold out and make a serviceable platform for a middle-aged BMX/trail bike with gears?