There are questions that a total stranger can answer from their basement 1,000 miles away, and there are questions that they cannot. This one would fall into the latter category. Spend the $20 and buy a new 110mm stem. If your shoulder hurts, do it again, and this time get the 100mm. You're not doing it right if you don't have extra handlebars, or brake levers, or saddles, or grips, or other **** lying around the garage.