This model of the SDF-1 is a remix based the fantastic work done by gwizdavid (https://www.thingiverse.com/thing:2649822). It was his hard work that created the stl files, so be sure to show him some love when you go there for the assembly guide (I'd repost it here, but don't want to do anything to take away from his work or wrongly take credit for it). I took his files, made a few repairs, and sized them to fit on my A1-mini. I tried to orient each of the pieces for maximum appeal, but I am sure that there are some element that could be improved upon further.

Each of the elements is 50% of the original size. Even then, when finished, this bad boy is just shy of 16.5" long. The original files were designed to be snap/friction-fit, but I found that the vast majority of parts really needed to be glued in place to be secure.