The other DIY R-Strap examples found here are awesome. Carrying your camera with the standard issue camera strap around one's neck is uncomfortable and unwieldy. So when I started using the R-Straps listed here, I was thrilled with the comfort. However, securing my beloved SLR via a screw in the tripod mount always seemed unsafe while hiking about. What if it unscrewed when I didn't notice? Disclaimer: it never DID come unscrewed, so perhaps I shouldn't complain. However, this is a more secure version of the strap based on a similar premise.
This solution has advantages over tripod mounted solutions in three ways:
1: It's safer. Nothing can come unscrewed and allow your SLR to crash to the floor
2: Your camera can be mounted on a tripod without first removing the strap.
3: You camera can sit flat on a table while the strap is installed.
Step 1: Tried-and-true Connector
Step 2: Tool: Razor Scraper
Step 3: Tools / Parts: Grommets
The right-most tool in the picture is the "punch" which cleanly punches a whole in the wide part of the camera strap for the center of the grommet to fit. I didn't cauterize the inside of the punched hole, though you could. I think the grommet holds it plenty secure from fraying.
Step 4: Camera Strap.
Step 5: Punch a Grommet Hole
Step 6: Hammer in the Grommet
Step 7: Trim the Strap to Size
Notice there is a leather connection sewn between the skinny trap and the fat strap. You will cut the fat strap part approximately 1 1/4 inch away from the leather connector. They you'll cut the skinny strap approximately 5 3/4 inches away from the leather connector.
You will need to "cauterize" the cut so the nylon does not fray. One way to do this is the cut with scissors and then melt with a lighter. Another way is to heat a knife (or razor blade) with a lighter, and cut with the hot blade. This cauterizes the cut as you go and looks very clean.
Step 8: The Piece Is Complete!
Step 9: Thread the Skinny Strap Onto the Camera
Now just get a strap with clips at each end (like from a messenger bag). Buy a clip at any hardware store and you're done.
I adjust the strap so the camera is right about at my hip. And I point the lens backward as it hangs. This makes it comfortable as it sits there.