$39 is a REEL deal!
I just remembered that the spool nut is captive, so loctite wouldn't work. That won't be a problem for you, since it looks like you're set up for right hand retrieve. Keep in mind that I obsess sometimes, and the idea that my knuckles could
knock the nut loose sent it back on ebay. I'm sure you won't have any problems, as the nut tightens when set for right hand retrieve.