Hi. Got some server equipment I would like to tidy up in a rack and as this is not something I have done before would like some advise. Equipment going in 4u Server PC 24 port TP-link Switch (not sure if this is 1u or 2u?) Pfsense router (Currently a SSF PC but will be moving to a 1u or 2u case) 1U Patch Panel 1u Power Bar I am thinking a 12U server rack should work for me but the bit I am not getting is the depth? The 4u Server case is 550mm (including handles) so do I just get a 550mm deep server rack? the rack I am looking at has a glass door also..