Becky...everything that's been mentioned could be causing the problem...but let me tell you what I just found out....
Big Bernie just made a trip to the repairman. (I was cussin' about it all on another thread a few days back !) The major
issue was just what you explained as well as some others. Come to find out there is a "check spring" in the upper threading
area that can get out of place and cause this( and a host of other) problems ! If this is the case, it is an easy fix...ultimately
one you can do yourself once shown how. My face was red
as the major cause ...supposedly.. is pulling the thread backwards
thru the machine! A NO-NO for sure...that I try not to do...tho many years of bad habit's hard to eliminate
....Mind you..there
is a big sticky note on my Bernie
! So, just anther bit of wisdom for us 8 series owners.
I'm still keeping my records and Renata's helps, and everyone's thoughts and encouragements on file as I'm not that sure
she's out of the woods. Will reserve letter-writing for now...and see how it goes. Tech was very helpful and didn't over do it.
Thanks all of you !!