Being 5'2" and having a back that goes out more often than I do, I find that by putting 2 rubber door stops behind my machine to tilt it forward, a book about 3" thick under the foot control, and a 5" book under my left foot, I can sew for hours.
This was the only way I could quilt a QS quilt for my 18 year old grandson. Having mild asperges he doesn't show a lot of emotion as a rule, but the look on his face, the tears in his eyes, and the hug, as well as not being able to stop saying "Thank You Nanna", made it all worthwhile.