I arrived at this forum with the goal of learning how to make a Eternal Flashlight, but found a wealth of knowledge far beyond expectation. After much reading, watching, coils and experimenting quietly, its is now time to see if I can offer something to this effort.
I decided to start with a "Lariman" build due to its circuit simplicity but still with the necessary components to understand the coils and what is required to tune them to the circuit. I have ordered circuit boards based on the above design and have a number of spare which I am happy to post to any one willing to commit to building and posting their progress.
So I will build one up and wind some coils and post progress soon.