I've replaced factory sights on 5 CZ pistols. I have a new P-01 and want to install Dawson night sights. I can't get the front sight to move even a little. The pin came out as they all have but using the Dawson punch and hitting it way harder than is comfortable it hasn't moved even a hair's width. I've soaked it with Ballistol, let it sir overnight but it hasn't budged. Any tips?