Thanks for the greeting and welcome Pa_friendly_guy !!
Oddmar I have looked as carefully as possible at your most recent diagram and it seems quite wonderful as a design idea for the situation I am trying to accomodate - thanks very much for sharing it !!!
Also, try as I may I cannot seem to wrap my thoughts around a couple of details - so I wonder if you might be kind enough to educate further about these things, please ??:
- Obviously there must be a structure joining and sealing what appears to be the smaller barrel with the larger barrel - would you please elaborate upon that idea ??
- It would seem likely there must be an open area as well as a thermal mass/battery in the 2nd, larger barrel - but these are also not obvious to me olde eyes - would you please elaborate upon this as well ??
Thanks !!