Hi leatheroo!
The hole is already 4 mm, the feed dog I adjusted by 2 screws as i can, nevertheless needle too close and on some materials shuts at front edge of hole.
Whether your 335 have a little loose on the shaft of the hook?
And on the feed dog frame is a small gap?
There are new gears, but not always tight contact, and i wonder do i need tighten them to each other or not?
Your manuals I've got, thanks, and they are for the new model of PFAFF 335. The needle frame in old 335 differs, the position of it quite other. there are similarities but I'm afraid all the same :-)) as I'm inexperienced in mechanics