The beauty of the Electristar/Nexstar EP Select RTFs is that the power systems are designed for standard .40-size glow arfs. In my opinion, most other .40-size glow trainers should fly with similar performance to your Electristar if you install the same power system. I believe you could install your Electristar outrunner and ESC in a Kadet LT-40 and be quite happy with the results.

I've seen Electristars in flight while using dual NiMH packs, and I've never thought the power system was anemic. Opjose may actually have stick time on an Electristar, however, where as I do not. I've only observed them in flight as a spectator.

I recommended the Tiger Trainer OBL specifically because of the removable cockpit hatch which provides battery access. The electric pilots I've spoken with who've converted .40-size glow aircraft have told me that having to remove the wing every time they want to get to their flight batteries is a pain in the ass. Cooling the batteries and speed controller are also a concern that would likely require modifications.

If you can cut a hatch and cooling vents into an LT-40, it should work fine and fly similarly to your Electristar. The LT-40 has very modest power requirements when flying with glow engines and I believe it would be just as terrific flying with the Electristar's power setup.