Did you check the springs for binding before installing them? That's the only way to see if you need to cut coils off.
Having said that, I don't know what intricacies, if any, there are with the twin springs... I suppose if the slide doesn't get all the way to the rear, figuring out which spring of the two needs to be cut is a problem. I'm tempted to hazard a guess or two, but I'd rather leave it to those who own one of these pistols.
Too many people miss the silver lining because they're expecting gold.
M. Setter
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