My VH has been bent for DAH & stayed the same years 5 now. My two Trojans, one O frame 20 other 1 Frame 16 ,were bent for DAH as a pair, work done same time. The 16 would not take the same bend, wanted to spring back just a bit. It's about 1/8 inch lower than the 20.
Fellow that does mine says it's very wood specific and you can't tell in advance for sure.
William
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