Be sure to use prusaslicers cut tool to cut the main scope piece in half (press “c” to cut) or else it might be pretty difficult to assemble the inner wires and LED's if you plan on using them. The scope piece should be printed in one layer if you want to actually see through it, it is a rectangle because you meant to cut it in place ti maintain a good friction fit.
The author marked this model as their own original creation.