The parts look awesome. I’ve not researched the snowspeeder on the RPF. I assume all those pieces came from model kits. That was one of the coolest ships ever. Even if it was ill equipped to take on an imperial walker.
Due to the scarcity of really decent close up images, coupled with the apparent fact that the speeder cannon details specifically in regards to the narrow rings on both the rear and forward cannon mounts appear to vary from example to example, I have had to strike a generic middle ground with a generous helping of artistic license mixed in to arrive my design of these replacements.
If I could find and undisputable clear reference for the screen used Skywalker speeder, then I'd happily re-model my CADs models to try and be faithful to the original as I could.. The closest I found is
here, looking closely many of the details appear to have been resin cast, which is evident by the numerous bubbles, this has also softened the details enough to make there true origin far less determinable .
The most photographed example (me included) is the one with the missing panel, and this one appears to use a waffle type pattern in the two recesses, while Luke's seem quite different, it may have used inverted 1/72 scale tank tracks, however this just might be a artifact caused by the resin casting, and is something I just can't verify.
It also appears that Hasbro have used the stencils of the missing panel example as the ZZ script looks to be different and only on the one side of Luke's speeder and probably due to it possibly only ever in camera from the right.
Following is my recreation of the Hasbro used ZZ markings, suitably roughened to mimic a stencil application (no idea what it says, there is some suggestion it may be derived from Hebrew).
When I took my own reference pictures of a speeder, apart from the relatively restricted access which curtailed true close-ups, I never envisioned that I have such a large scale model to work on or that when I did get my hands on it that there would be visual details due to the result of manufacturing processes that would erk me so much that I'd be forced to try and rectify them. Through affordable 3D printing into the mix and here we are.
Any way back to the project in hand, I found a few clearance issues with my first print and other areas where I'd given too generous one at the detriment of detail, second print was closer but revealed new collision points, hopefully third times a charm (now printing).
Cheers