I liked printing this with the Creality slicer due to the way it does supports by default. However, I did also print this with Orca slicer and tree supports and it was fine, just a little added waste and time. This print is designed to work with the PrintAcademy Threadboard and is designed to work with either the screws with 13mm thick heads or the thinner heads. 

Holder for this set here. https://www.homedepot.com/p/DEWALT-Modular-Right-Angle-Attachment-Set-DWAMRASET/314674938?g_store=&source=shoppingads&locale=en-US&pla&mtc=SHOPPING-BF-CDP-GGL-D25P-025_007_POWER_TOOL_ACCESSORIES-NA-Multi-NA-PMAX-NA-NA-NA-NA-NBR-NA-NA-NA-Power_Tool_Accessories2024_EXISTING_BHU24_PLA_TEST&cm_mmc=SHOPPING-BF-CDP-GGL-D25P-025_007_POWER_TOOL_ACCESSORIES-NA-Multi-NA-PMAX-NA-NA-NA-NA-NBR-NA-NA-NA-Power_Tool_Accessories2024_EXISTING_BHU24_PLA_TEST-20536976352--&gad_source=1&gclid=Cj0KCQiAst67BhCEARIsAKKdWOmkDMF8IcH-miK5Ip2qhNh5NELVBw0dsSz18ceEiOAGGhrvuBEA090aAiCgEALw_wcB&gclsrc=aw.ds