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This was a very fun print. Took about a weekend on my robo 3d r1 plus. Print turned out looking good. Design is very well engineered.
I used White Esun PLA at 205 degrees with a 50 degree bed. and 50% infill. Some of the models required me to rotate and position them on the build plate manually as the arms were too long to print straight across, I made them diagonal corner to corner on the plate. I used high strength hairspray on the print bed. Very Important turn off support structures, the model prints fine without them, this was my logic for using 205 rather than my normal 210 on the head temp.
If I were to do it again I would use 100% infill as I feel this would make it a bit more solid. I took all the fasteners and printed them in one print which turned out fine, but I would recommend printing spare back pin as I broke a few getting them installed correctly. Heck just print two sets of fasteners to start out with as you might break them. I also would have gone lighter on the hairspray in the center of the bed and only put liberal amounts on the corners where the model was most likely to peel up. The large flat pieces were hard to peel from the bed.
First print the "Right Pad" then the "Left Pad" and the "Pad Spine", this way you can glue them together while you are printing the rest of the parts.
Second print the Right and Left Top Bracket and glue the two of those to either the right or the left wall (Leave one of the walls off so you can put them all together in the end.)
Print the rest and assemble, last step gluing the wall that you left off to the top bracket.
@Mdavisgtm props here, I really like the design, one suggestion on the engineering would be to somehow connect the right and the left brace together so they do not slip from the track.