Change the shape of lever restrictor. Collar not only limits throw, it also guides your inputs, find the one that match your play style.
White Collar doesn't add any compression to the silicone, it keeps the silicone relax at neutral position.
Black Collar have profile that compress the silicone when installed, it adds slightly tension but improve the stability.
*GL Full Collar need 35mm Hole, perfect for Korean standard case with 35mm lever hole.