This is a great concept and excellent execution. I found it after I had finished creating the dovetail slots on my CNC spoilboard. I am considering remixing it to remove the outer slot on the surface of the clamp, which I could not find a way to do with the parameters in the f3d file (I'm not a f3d expert, or really inclined to be). If the clamps are printed with this face down, rather than foot-side down, the part should have a much higher strength along the clamping plane (otherwise the clamping force could easily crack the part along a layer line). However, the outer slot needs supports when printed in that orientation, and I am not completely sure the slot is necessary--kindof gets in the way with the matchfit hardware.
Printed in abs-gf.

Not sure if it's just my slicer settings, but the default bracket tolerance seems to be way too loose. It was nowhere near a snap fit for me. That said, the author did include the fusion files for this exact reason. I bumbled my way though fusion to adjust it; the top frame rail measured a hair under 18mm (17.97 is the exact measurement I got), and it seems that this print is aiming for about 0.8mm more than that. I brought that down to just 0.4mm, which resulted in a decent snap over the rail, but still very loose in terms of sliding it parallel to the rail. I'm just going to shove something in the gap to reduce the play and call it a day. I'll update with my make when I get the correct heat inserts later this week.
@SeeingRED_316885 I'm glad you were able to use the Fusion 360 file to get a print that works for you (or at least close). I double-checked the measurements on my rail, and I came up with 18.2mm. I guess not all rails were created equal! My bracket is slightly loose but is easy to get on and off in case I want to move it. I hope you enjoy the model!
@dumgoat_1274190 ah, I checked my other rails because of what you said. I've got one at 17.90, two at about 18 flat, and one at the 18.2 that you've measured. I bet your model would fit well on the 18.2 rail in that case, unfortunately that's not the one I chose to mount it on. Seems like the tolerance on China's cheapest rails is pretty loose.
My concern with it being able to slide is that it may rattle during prints or negatively affect resonances, which is why I am choosing I fill the gap tightly.
Despite my apparently unfounded complaint, I do appreciate your time and including the files needed to adapt it for other uses