I'm in a wait and see mode on Castle stuff. Fact is, If you try to get a new HV ESC at this time, it is rather difficult as most retailers are out of stock/placed on backorder and that goes for both Castle and non-Castle stuff. May not be a big deal if you are waiting till spring to fly.

As for runtimes, bear in mind I am not talking about Super-edfs. I should have prefaced that my interest is mainly conversions of existing designs and airframes with limited space with a bend toward economy.