I sew on vintage machines (in this case model 66)- this will become relevant later in the list:
Reasons I shouldn't sew after midnight:
1/ It wakes the rabbit and she makes a ton of noise
2/ seam allowances mystically change from 1/4" to 5/8" and back again
The following occur after I've decided the machine needs a good cleaning and that's the reason for all my troubles:
3/ It takes me 30 min of sewing with thread that's breaking to realize I have the needle in backwards
4/ It takes two hours of playing with the thread tension, stitch length etc to realize that the reason I have no upper thread tension no matter what I adjust is because I have the thread behind the tension discs instead of between them.
5/ somewhere around one am I forget that the hand wheel needs to spin towards me not away and it takes another 15 min to figure out why the machine's not sewing.
Just thought someone might find this entertaining. That and the thread tension thing is something that makes you want to smack your forehead and go "Duh!" but I'm betting I'm not the only one that's done it.
Happy sewing!!!!!