Hard but not impossible. 1/4" quilt, I glued the top making sure that there was no glue on the arm rest area, and allowed to dry overnight. Then I wet the arm rest area, placed a damp towel on top and with an iron steamed it for about 3-5 minutes, once it started to get pliable I used quite a few clamps and clamped it down slowly. The trick is to go slow and make sure that the wood is pliable enough. You can test this by pushing on it once in a while, mine started to feel like soft urethane when I thought it was ready to bend. Once you bend it all the way down, let it dry overnight. I used a heat gun in low to blow some air between the mahogany and the maple and on the top a little. Once the top appeared dry, I left it till the next day. Removed the clamps, added glue with a brush to reach all the way into the arm rest and clamped again. Once dry I routed the top on a table router