if you really want the intellijel 1u in a diy case i'd not bother with the endplates
if you want to use endplates for the 3u and possibly a row of pulp logic sized 1u then make a couple of correctly sized endplates out of some thin wood
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities