The depicted rail pre-filling is (at what I presume the back) is not a 2 nuts/U ratio. If your use-case demands equal ratio front to back for 1U units, this rack comes short and it can't be adjusted. This is already a planning issue as I need to decide how many nuts I put in between and below/above 4 drawers I have in here and back facing patch panels (network and sound) and power strips. This for a margin of less than €3,00 total cost on an almost €300 case is typical Thomann skimping on quality. Also the depicted side rails with had no nuts in any of them, but they at least can be back filled. Otherwise quality gear, not worth sending it back for (knowing their low customer service standard), still something which shows quality issues at Thomann.