Hey Andrew I like your Chanel. Contact buckle guys they have a wonderful tool for copper rivets I have the 3 types In my shop and I love them. Also this is my two cents if you put a leather washer under you will find that the rivet doesn’t damage the leather over time. Later and stay safe

Try using the round end of you bullpen hammer for your rivets you're will get a more vintage, homemade, cool look

Hit up Buckle guy for a nice rivet setting set. Nice video!

Hi I appreciate making something without test fitting. Conway buckles are a good choice, I didn't know copper are available. Regarding rivet setters. McMaster Carr has setters, Ohio Travel Bag (OTB) also has the copper rivet setters and other setters. I've found that the OTB Jiffy Rivet setter work good for creating a good dome: ohiotravelbag.com/collections/tools/products/t-1316. You might also like the Duluth Pack Behind the Scenes video, skip to the 10 minute mark for the riveting: kzfaq.info/get/bejne/gt2bkrujnNKUZXU.html