Can a new spring fix the pulling power of Rapido's Stirling Single?
I promised a link to the springs in the description, but the seller I used has disappeared. Instead of providing a link, which could be obsolete the moment the listing changes, I've decided to provide the specs for anyone looking for these springs long into the future. The spring wire diameter is 0.2mm, the outer spring diameter is 4mm, and the total length is 10mm. Increase wire diameter to 0.3mm if you'd like a slightly stronger spring for greater stability. 0.2mm worked great for me.
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0:00 Intro
2:09 Unmodified Testing
5:56 Modifications
9:14 Modified Load Tests