Dynatron on 4 cell A123-2300 spins at about 2400 rpm... sometimes I dont have the idle high enough and when I pull the starter off and the engine slows down it hits and runs... No spinner so a single bolt prop is a good idea as you cant keep the starter centered on a 4 bolt setup with no spinner...

The 4 cell A123-1100 would spin the DLE-30 with choke off.... wont with choke on... engine has good compression.

This weekend I started using the new A123-4400 cells and the 4S pack spins the 30 like water....128 amps continuous....