Hi, Mickey2, thanks for the input! !
"I oil every time I use it (which isn't everyday) I pay extra attention to the worm gear behind the Elnagraph."
I re-oiled this morning with the help of the manual, maybe got a couple of points I had missed before. Seemed to help somewhat. I saw that worm gear and considered putting some triflow grease on it - but didn't want to foul anything up! Would you recommend that, though?
"You have taken the bobbin case appart? As mentioned, it's not very noisy on lower speeds, it's worth to keep going over oil points everywhere, but for tops speeds it's louder."
Yes, that'd be exactly how mine runs. Low speeds it has a cute little puppy growl, high speeds it's full on junk yard dog - almost alarming. I have taken the bobbin out and cleaned, but have yet to try to clean behind the hook.