Hello i buy old singer model 29k56 long arm i have problem with bad stitch one way stich is ok but if i turn stitch looks horrible... in my opinion problem is with very old needle plate sorry for my english guys :-)
send 3 photo for more info
https://ibb.co/KD9TCkM
https://ibb.co/5rk6cvQ
https://ibb.co/NFTfYwL