Maybe my able doctor should attach sowing as one of his entrepreneur skill☺️, I must say you sewed that black trouser very well and appropriately, I use to hand sow some of my little patches my own self too and I know how it is,it's not really simple sowing that particular region straight like the machine will do, but it has been of help when I maybe run out of cash to give my clothes to a tailor, or maybe I ran out of luck and couldn't get a tailor that day to sow my cloth I calmly and peacefully use my needle and thread to perform the task and move on, I love this challenge and would love to partake in it too☺️