We're happy to see you so excited about our project! To answer your questions:
1. Are the 3D models on Hackster now up to date?:
Yes they are now up to date. We've now printed these models more than thirty times, making small adjustments each time to correct for common deficiencies of FDM 3d printing technology. These models are stronger (thicker walls) and should require less support material.
2.Is the IMU being supported at this time? What I really mean is do I need to install it right now? Will the scanner work without the IMU being installed.
We do not currently use the IMU in the scanning software, but that will change soon. We made the IMU a default component in the kit, so everyone will likely have one. Some of the useful things we plan to use the IMU for are automatically leveling the scan data, tracking the compass orientation of the scanner between multiple scans, and possibly some dead reckoning, so that multiple scan merging can be performed more easily.
3. On page 8 of the assembly instructions. The top photos shows the terminal strips (correctly) facing in toward the center of the board. However the text states "Insert motor screw terminals into motor HAT in the reverse direction as shown,". This makes it sound like the picture is wrong, No the picture is correct, the text is wrong!
I agree the text can be confusing if your haven't assembled the motor HAT previously and don't know that the motor terminals were originally intended to face away from the board. I'm going to change the text to read "Insert motor screw terminals into motor HAT in the direction shown, then solder in place." Sound better?
4. The assembly instructions on pages 10 & 11 show the bubble level being installed from the inside of the case. This seems to be incorrect. It naturally drops into the 'well' from the outside and rests on the shelf at the bottom. I would be surprised if there were any adjustment needed if the 3D print was correct. Anyhow, that's the way I'm building mine!!
The device is designed so that the bubble level snaps in from inside the cover. This keeps the bubble level tucked away. Even small inaccuracies in the 3D prints (warping/stringing) can cause differences in the way the bubble level sits. I suggest that people fine tune the mounting of the bubble level, because it makes it much easier to align scans later on if they are level relative to each other. This might also be achieved later with the IMU and our web interface.
With regard to using the 8mm bearings, they are primarily there for those that want to use their scanner on it's side (so they can point the pole at something to get higher resolutions scans of it). They also help keep the scanner bracket perpendicular to the scanner cover, which is important for preventing distortion in the scans. All the 3D printed parts have had some important tweaks made to them, and if you have the ability, I would recommend remaking them all. We thinking of moving the models from Hackster to someplace like Thingyverse soon, so that people can comment on them and make modifications to them.