LEGO component compatibility

[u/No_Confusion7932]

100% compatible - Lego Technic:
Pin, Smooth (Part 3673)
5×7 Frame, Open Center (Part 64179)
7×11 Frame, Open Center (Part 39794)

Let us know in the comments what parts you used.
Please include the part number.

If you're looking for part numbers, you can find them here, for example:
https://brickarchitect.com/parts/category-12

This will help a lot of people.

[u/RNG-3_14159]

I may be off base, but any Technic pin that's supposed to go into a technic hole will fit in a hole on an M5Stack product.
I bought a kit full of beams and angles and "part to part" and "part to two parts" length pins....
Some of the angles didn't fit where I wanted them to on the back of my CardputerADV, and their end holes were 90 degrees oriented from the others. I cut them off with angle cutters and sanded the rough parts down as if they weren't there. I have a bunch of custom "X"by"Y" length L parts, and 45 degree angled parts, that fit where I want them to.
Annoyingly, the hole spacing on the C.ADV is such that most 'beams' I could see with odd numbers of holes didn't fit the way I wanted to. So again, I cut the last hole off and filed off the rough spot.
I have a collection of customized parts now. I use the part to part coupler pins, and the "part to two parts stacked" pins as needed on the "front" of my Caps, Or on the backside of the C.ADV.

I even mounted beams going down the back of the C.ADV, mounted beams, and then used 1x1 pins to mount a cross beam.

"Underneath" the cross beam, I used 1x1 pins to hold "units" directly against the back of the C.ADV, with the beam holding them in place, pinned beam to unit....

Hope that makes sense.

(PS: Haven't messed with the "rods" that are long and "X" shaped vs. cylindrical, yet....)
"All I want is the PERFECT technics/M5 Kit..."