I recently was given a Berina Bernette model 234 serger w/ out the manual. I printed one off the internet, but am still having a very difficult time threading it (lower loop - don't know if its the first or second). I wish I could be more descriptive, but I've never used a serger before, and unfortunately don't know anyone that has/uses one to instruct me. I've gone to local sewing/craft stores and they've been most unhelpful, since the machine wasn't purchased at their stores they're unwilling… Continue