On a hyperdrive pro3 slider chassie what battery tray is best for running a smc or thunderpower 1 cell lipo battery,would it be the 6 cell or 4 cell tray or is there a certain tray made just for the pro3 slider. if i need to buy a tray where would i get one from.

I put the 4 cell tray back on when I switched over to 1 cell. I like it better because you can put the receiver, receiver pack, and the transponder back on the tray. Lefthander still has them in stock.
http://www.lefthander-rc.com/catalog/product_info.php?cPath=36&products_id=767

try the lipo only tray..ooops no one makes one yet!

i would get the brushless tray it has a bigger pad on lr for speedo