You're a braver man than I am Jean.
In respect of pesi expansion causing a crack in the hilt:-
over a + 50 year period I have removed more hilts than I can remember from various types of blades, certainly the number of hilts I have removed would be somewhere in the hundreds. When I am at home I use a propane torch to heat the blade, when I am in Jawa I use either a candle or a small kerosene lamp. Removal of a hilt is something that I do as a very simple and basic operation that requires no thought and no interruption to work flow.
Never, ever, have I had a hilt crack during removal because of heat expansion.
I would not recommend any inexperienced person to use a propane torch.
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