This is a lot of work to build; print, sand, screw, sand again, glue, solder, configure and adjust. Depending on your skills and experience I believe it would take 1 to 2 weeks of printing and then at least 20 hours (more like 40) of assembling.
This is a lot of work to use; adjusting the Gugusse after a change of format can easily take more than half an hour.
This is a slow capture, between 0.2fps to 0.88fps depending on format and settings. Don't count much on making more than one big reel a day.
If your intentions is just about 8mm and super8, you should look into this simpler project that gives similar results:
The T-Scann 8.
There is a lot of post-processing involved, the picture needs to be stabilized, cropped, resized and adjusted for light and colors, I also have to perform lens flares mitigation (for 35mm capture only)
The lens is not perfect, it was very difficult to find something decent but there are still small issues with it, the Edmund blue series 17.5mm f5.6 is perfect for resolution and absence of distorsion but I do have some lens flares happening (35mm only, the lens is perfect for the smaller formats)
The new software is
GUI driven.
This will produce a plastic machine with plastic flywheels, this will not give the same result as if they were made like clockwork with metal, so they require a lot of post-processing to stabilize the resulting pictures. You can see what it can do in this channel:
Youtube channel .
There is no rewind system, I have used a drill and some tape (in the other hand you are not required to rewind, you can capture backward and reverse it back in post). You can also use Hand Rewinds often found on eBay.
To have some film tension you need the film to be tightly spooled on its reel, if the film is too loose you'll have to perform an heresy and tighten it, I remember seeing an old movie of DOs and DON'Ts about films that explicitly advised to not tight a film on a spool.
Although it's relatively easy to capture sound with the Gugusse when it's optical there is no way to capture it when it is a magnetic track.