I managed to put together a decent version of the seat cover in red vinyl, the front welt cord went on well after the second attempt, the longer piece of welt going around back of the seat I accidentally sewed in backwards, so the round portion was on the inside when I flipped the cover right side out...no biggie. I realized sewing my pattern on the top would be easier without the back on so ill do that next, then re sew the welt, then the lower strip.
My buddy is building out a custom cb500 and he is making a fully custom seat, it should be good and ill share that too.
The lower rotary hook component has some excessive play, we've been looking for genuine Pfaff parts but they are non existent for the most part, If anyone has an extra genuine lower rotary hook or hook and bobbin for sale for a 145 or 545 we are in the market...in the mean time I ordered an aftermarket for 40 bucks.
Also, if you have a 145 or 545 sewing machine for parts in the 100-200 bucks range in michigan, lmk.