I just got through tuning up an old Ben Pearson recurve with an identical twist. I tried the hot water thing it it wouldn't take the twist out of mine. so rathere than sanding or grinding on it, i used a heat gun. (High powered hair dryer) I put the thing in by bow press with just enough tension to hold the bow steady. Then i took a piece old t-shirt and dampend it slightly and wrapped it around the twisted limb. Then i took a 10" crescent wrench and fit it over the t-shirt covered limb at 90 degrees. i hung a 20 ounce fishing weight off off the end of the wrench to add a little preasure besides the weight of the wrench. i heated the cloth until it was steaming slightly. and left the wrench with the weight on it over night. BINGO!!!! It took the twist out & it stayed straight too.