My OS 21 RG just died. I'm on quart one of gallon #3. My crank busted.
Here's my "annoyed about it" thread:
https://www.rcnitrotalk.com/forum/showthread.php?s=&threadid=13777
Here's my "annoyed about it" thread:
https://www.rcnitrotalk.com/forum/showthread.php?s=&threadid=13777