Easy to print on its side. Once printed, remove the build-in support plate. It should be fairly easy to pull out with pliers starting from the hole. Does not require any additional support.

Print was designed for 0.2mm layer height and 0.4mm nozzle. Should work for 0.15mm layer height but higher will probably cause problems with the support plate. I printed it in both PETG and ASA but should be fine with other types.

The version with the tape gap can be used with thicker (removable) double sided tape. The gap is 1mm deep, assuming 2mm thick tape (e.g. 3M Command strips).