Hey guys, sorry to hijack, but I didn't find any other remotely active thread to ask this, but I have a small milk crate full of O.S. engines (2 stroke and 4 stroke) and I am trying to find out what distinguishing marks to look for to help identify them? I'm not new to Nitro, and I'm not new to planes, but I am new to Nitro Planes (if that makes sense) and I recently got a small SUV full of planes, motors, a few TX's and a bunch of parts. Trying to determine what is worth keeping/selling/trashing/giving away.