Hey I need advice on this.

So I wanted to have a padlock that I could gut and repin anytime I wanted to, because I want to learn how to pick different driver pins and I am in the city and have the chance to buy an abus 838cs titalium padlock and it is said to be a good padlock to gut and repick but I wanted to know what the pins' diameter are in there, because I need to buy driver pins of the same diameter so they fit inside and aren't moving too loosely, does anyone know it's pins' diameter? And should I just buy this and buy a set of driver pins or just buy sparrows's revolver repinnable lock? My budget is in 30 bucks I can afford to spend 50 bucks but I would rather not to, and I can learn a lot with a repinnable padlock/lock.