![Four thousand pieces and twelve hours later, 42100 is finally complete, awaiting batteries to test the motor functions : r/legotechnic Four thousand pieces and twelve hours later, 42100 is finally complete, awaiting batteries to test the motor functions : r/legotechnic](https://preview.redd.it/four-thousand-pieces-and-twelve-hours-later-42100-is-v0-jq6h3bewbhx81.jpg?width=640&crop=smart&auto=webp&s=7b7ae3f971d7d80340d926202e53a38c66ca7162)
Four thousand pieces and twelve hours later, 42100 is finally complete, awaiting batteries to test the motor functions : r/legotechnic
![Mould King High-Tech Motorized Liebher Terex RH400 Mining Excavator R9800 Electric RC Car Building Blocks Compatible 42100 TOYS _ - AliExpress Mobile Mould King High-Tech Motorized Liebher Terex RH400 Mining Excavator R9800 Electric RC Car Building Blocks Compatible 42100 TOYS _ - AliExpress Mobile](https://ae01.alicdn.com/kf/H98e8b7b2968f4ca6b4eb4d33193b1c7be/Mould-King-High-Tech-Motorized-Liebher-Terex-RH400-Mining-Excavator-R9800-Electric-RC-Car-Building-Blocks.jpg)
Mould King High-Tech Motorized Liebher Terex RH400 Mining Excavator R9800 Electric RC Car Building Blocks Compatible 42100 TOYS _ - AliExpress Mobile
![There are 42 years between those two sets. 1977 vs 2019. What a huge progress! (LEGO 42100 and LEGO 850) : r/legotechnic There are 42 years between those two sets. 1977 vs 2019. What a huge progress! (LEGO 42100 and LEGO 850) : r/legotechnic](https://i.redd.it/ocvqte9lq4q31.jpg)
There are 42 years between those two sets. 1977 vs 2019. What a huge progress! (LEGO 42100 and LEGO 850) : r/legotechnic
![Mouldking 13130 Liebherr R 9800 Excavator Compatible 42100 Building Blocks Bricks Educational Toys Christmas Gifts For Children | Wish Mouldking 13130 Liebherr R 9800 Excavator Compatible 42100 Building Blocks Bricks Educational Toys Christmas Gifts For Children | Wish](https://canary.contestimg.wish.com/api/webimage/5e01ef5672d3e407553d5aee-contest.jpg?cache_buster=de5fc9e25f7d0befefe9c1ad5d06869f)