I think this is the first time one of my comments has ever gotten mentioned in a subsequent post, so that's cool :)

Glad it was helpful and not me being an idiot. That's a shame about the temp read out. I just checked my MikroTik and can see the same thing. In fact, the only SFP module reporting a temperature at all is the real fiber one, all of the DACs/converters report nothing. No voltage either.

Thanks for making the comment! It saved me having to bolt a USB fan over the old, misbehaving SFP+ module or something similarly silly...