Those inlet ducts look a little small for EDF. Plus, if you want EDF you'd have to make some ducting for the air flow to the fan. Not a huge deal as long as you know what you are looking for with the EDF ducting, but certainly more work than putting in a Rabbit and getting it set up for turbine.

I have a Tamjets A-4, but I'm not familiar with the CJM kit. What are the dimentions and projected weight? Looks like it will be fun!