Suggestions for cheap lightweight guidescope

[Daniel]

Im thinking of buying a guidescope to go on my Celestron C8n, I've heard the CG5 mount im using right now probably won't hold a whole lot more than I have hooked up to it right now (the camera is pretty weighty itself) and I was wondering if anyone had any suggestions as to what I could get away with for a guidescope, also, what would i need to mount it, I have one piggyback adapter right now, but most pics i've seen of guidescopes seem to be using 2

Thanks

Daniel
:O)