Hi fellas! No load until sunday I think. Gotta get pour-foamed the rest of the stack. I made a brand new charge today, -72.5°C with solid 0.1bar LP / 8bar HP, avoided the R-507 as I only charged R-290/R-600 cooking gas blend and CO2. Eco friendly gas charge and it's very cheap too . The ambient temperature was well above 31°C It was a really hot day!







Any chance of acquiring R170 to charge with?
Don't know, but do you think If I rather go a bit easier on the CO2 charge and add some R-1150? I think I could get into -85°C league with some positive back pressure, what are your thoughts on this charge?

Best Regards and thanks for your nice thoughts and enthusiasm,
Niko