I find push pull fine for bows upto the 100lb sort of weight (although I think it varies a lot between bows of the same weight as to how difficult to string they are)
my 133lb bow I usually use a stringer but I can string/destring it using the method of resting a bow tip on the ground and kneeling on the centre of the bow whilst holding the other bow tip
I think using a stringer is always the best idea though
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