Repetition Spring Adjustment

[Patrick C Poulson]

Hello all: I have the action from a 1927 Story and Clark grand in the shop,
with peculiar repetition springs.  They loop up out of the jack window,
curve backwards, and hook onto a string loop that comes out of the top of
the wippen.  Has anyone worked on such an animal before, and if so, is there
a way to adjust the spring tension short of disengaging it from the loop,
bending it, and then replacing it? I am leery about doing it that way,
because the loops are cotton and some of them have snapped already. I fear
that I may have to just break down and replace them all.  Help Mister
Wizard!
Patrick Poulson, RPT