Frustrated, Errrrrrr....

I purchased my Artistic 640 Bernina 2nd hand about 3 years ago.  And I loved it.  But, but, but, I really think my bobbin housing unit is screwed up.  I have had it in twice now for fixing.  During the embroidering process after about 2 min it starts to nest underneath and starts clinking.  I fix it, I pull every little thread out, I clean it,  blow on it, brush it but it still clinks.  I don't embroidery alot, but when I do, I want it to work.  Ya Know!   Well I was making a cute little tooth fairy pillow for my Emma.  Her tooth is ready anyday now to fall out and she is so silly about it.  Girls usually are.  But NO, I have to take it in again to see what is wrong.  
First I am a hands on girl and want to fix it myself.  But no symatics are on any web sight,  even the Bernina Repairman can't get one for me.  So he says.  So in I go with my machine all packed up, with another note and example of problem and there it will sit for 1 to 2 weeks until they get in whatever part they need and so by the time I get my machine back, I am on my way to another project. 
I gave up embroidery of a pink ribbon that I wanted on Emma's sister's quilt because of the last screw up with the nesting and bobbin housing flare up. 

Life is good though.  How can I complain? I can look at it as a challenge or a problem.  I like challenges better.  So I am going to quit my whinning, work on another project and maybe buy a tooth fairy pillow.    NOT!  Hehe!