I used to never use inserts because I didn't like the distance between the finger holes, 1/4" for the bridge then the thickness of the walls of the inserts added up to too much gap.
Since coming back to bowling, I discovered "lady" inserts. I use the largest size ( I think 6 1/2 ) giving the thinnest walls.
I don't need the insert to be snug around the finger, just need to feel a hint of lifter under my fingers.
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