I think that there should be a device added, purchasable by the Black Market Dealer, which would allow you to practice the hack for the printer rack. This would be very useful as the hack isn't the easiest to complete, especially if raiding a base full of players. Not to mention that the only way to practice the hack is if you happen to have a friends or someone else's printer rack to practice it on, and once you get it then they have to be there to re-lock it... Thank you!