Good thought. Tried 2017 backend on io body with battery. It works, but noticed a brief light off flicker at start, and near end of draw. Never any flicker normally. Probably due to micro oxidized gunk buildup on 2017 backend threads? Maybe the brass threading on the io helps as well?
I'm trying to avoid taking it apart, and rethreading it on the io. Bit of a task. Something thin and grippy helps, I used latex gloves
Interesting to note that it worked without the adapter.
With the flickering, do you think it engaged a low power mode? Was the draw otherwise normal? Any back end heat?
It might be a resistive difference causing these observations. The io being much higher wattage would require significantly more current. The legacy back end is less efficient, plus with the adapter, it might just not be a direct enough path to pump the necessary power down the line.
It would be interesting to try with the io back end to see if it is functional with the adapter.
One question, how much clip bending is needed to apply this adapter?
I wonder if the threaded ring could be slotted to allow for easy installation. I don't know if voiding material on the threads would pose a problem, but it would be nice to be able to have the option to quickly swap between cell and mains power.
My HT GH is from the 4/20/18 sale. SN GT0125XX
I have GT012614 from the same sale. Will be interesting to see how the threading compares, I suppose