Thank you, Sir. You're absolutely right. I borrowed this 5 mm drill from my dad, but didn't take the power drill for a reason. I bought 12 of these cabinets used and already assembled for 20€ each.
If I use the power drill I could drill 2 of 4 holes within seconds. But since the back wall is already assembled, the power drill would be too thick. This was an experiment for all other assembled cabinets I have and it was successful. Precise hand drilling led to an even third floor. More on Sunday.
Thanks for coming by!