Best battery?

[VintageMA]

You could try rclipos.com for the batteries.
You could order the Neu through Castle if Mike doesn't have them in stock - I just got a Neu 1512/3.5d through Castle and even though they say 2-4 weeks I just got my CC just got charged 1 week later, so hopefully I will see it in a few days.

Get the hardened pinions here and make sure to set the msh just right (not too tight and not too lose - just a little freedom on the gears to compensate for chassis flex) and you'll be fine. These hardened pinions are hard to kill.