Self Locking Shelf Support Peg

One of the shelves in my kitchen cabinets was getting wobbly because the support peg's on it had broken.  I was able to find replacements online (I found a part number 4732358 on them) but I wanted to know if I could come up with a printable replacement.  It turns out it was possible and they actually work great!  The online replacements are pretty cheap in bulk but if you just want to fix it NOW then this is a great replacement. I actually have a baggie of purchased replacements and I just haven't bothered to put them in because mine, well...work.  :)

Material: PLA
I tested this in both PLA+ and PETG and I found that the PLA+ version works better as the flexibility of PETG works against it in the application.  

Settings:
.2mm Layer Height
5 Perimeters / Walls
5 Top Layers
5 bottom Layers
25% infill

These settings result in mostly perimeters to help increase the strength of the print as it's pretty small.

Orientation:
This was the biggest headache...this part doesn't lend itself well to printing but I settled on printing it with the peg facing the bed and using thin tree supports.  As long as your support settings are dialed-in well you should have no issues.  It might work well on it's side, too, but I was afraid that might make the locking pieces hard to remove from supports.  If you try it out that way let know how it works!

As always I've included STEP and STL files so those with more design skills can improve on my work.  I hope this helps someone!

NOTE:  The pictured piece was from an earlier prototype and the uploaded STL has a longer shelf and better angles on the locking mechanism.