I know the 214x1 (Sys 328) have different shaft sizes / diameters and I know they are for the Singer 45K Adler 4, 5, 104,104 and so forth. I also use them in My 133K3 (no problems in general) but the original needle for the 133K3 is the 216x1 regarding the Singer manual. I just noticed that the 214x1 (328) size 200 METWAR needles (Metwar is now Groz Beckert) do NOT touch the hook whereas the thinner SCHMETZ 180 + 160 DO slightly touch the hook. it´s probably because the needle is thinner and th