Hi my name is Dan I just get a pfaff 138-6  and I'm trying  to use a teflon presser foot narrow to work with light fabric I made mask for wrestlers lucha libre. I'm pretty new with this machine an there is not many information online   I found an article where it said you can loosen the shaft then you moved the bar or adjust to the desire high also they mentioned on the article  you can buy it a presser foot extension or adapter     #91-006603-22  so I have questions and I will appreciate  it any help with my next questions???
 
	1. How can I loosen the shaft in order to moved down the bar with out not cause any problem because I don't anything about it. And that way I dont need to buy  any presser  foot extension.
 
	2. If I bought  the presser foot extension or adapter #91-006603-22 what kind of presser foot teflon high shank can I used??
 
	Thanks for reading hope hear from you guys