I think that people interested in LENR replication will find the following video from Freethinker quite interesting. Freethinker is, I believe Swedish, and has been getting quite serious about replicating dogbone-type devices.
This video shows his efforts to insulate his reactor, to help prevent burnout of his wires by reducing the amount of power needed to maintain high temperatures. If you look at the last part of the video you’ll see that his system of insulation using aluminum oxide bricks seems to work very well.
He has a very nice setup and I look forward to seeing how his experiments progress.