Guardian anti-pullout device experiences?

Hello fellow couples who enjoy keeping the key. I recently picked up one of these to fit onto my MaleChastityNow Amicus cage, aiming to stop it from slipping out when things get slippery. … -cb-series The performance has been good so far, but I plan to swap in pins of varying lengths for a tighter fit. It’s quite a hassle trying to push them into the opening after taking one out. Has anyone else dealt with tweaking or customizing these accessories? Appreciate any insights.