Construction technique: Tab and Slot with T-nut

Fillet weld or slot and tab?? slot and tab When designing your sheet metal parts with tab and slots for laser cutting with SendCutSend, keep material thickness and finishes in mind slot car sets for adults I'm trying to do a tab and Slot on a non-sheet metal part I can't figure out why it won't work, or what I need to select to get it to work

slot dana deposit 5000 A simple file containing vectors to help you get started designing parts that fit together with slot and tab construction This file is set up for our 18