Also, if you have that spare fabric from the shortening of the jacket, you might be able to let out the cuffs all the way to within a quarter inch or so of the pard of the sleeve that has been folded up into the sleeve from the old hem. The new facing would be sewn right side to right side on the outside of the sleeve, then turned back inside to make a seam at the edge or just inside of the end of the cuff. An interfacing would need to be added between the fold on the inside. It wouldn't work if the outside of the sleeve is faded or worn more than the inside. Bla bla bla.