I dont normally straighten the sticks this way , but it was raining hard and havnt enought room in the workshop to get my foldable bench in .normally do it outside .
but had 3 goes with this stick about 10 mins for each sesion then left it to get cold before the next stage .It worked okay but its better to use steam.
If you go to the homemade walking stick forum scroll back to page 5 ,there is a topic there called "My first stick, Hawthorn" there is a bit more info on stick straightening