Laser cut parts hard to remove from boards and the parts fit too tight.
The pieces were very difficult to assemble, even using wax. I broke some pieces trying to make them fit and had to glue them together. Some of the illustrations were vague and I had to take apart an assembly to reverse a piece. After it was finished, there was too much friction with the gears and it went slow and stopped often. I have had much better luck with other UGEAR kits. After this one, I will not be buying any more UGEAR kits.
All of the Wooden models that I have purchased have been great. I have been totally satisfied with them. As for the latest one the UGears Aviator, I will have to write you back at a later date. My wife purchased this one as a Christmas present for me. I will let you know my thoughts after I assemble it.
Rich Kroncke