With over four thousand pieces, seven electric motors, and the new Control+ bluetooth receiver, LEGO’s enormous 42100 Technic Liebherr R 9800 Control set is a great place to start if you want to build a B-Model. So much so that previous bloggee Eric Trax has actually built two. Following his Bobcat skid-steer loader that appeared here earlier in the year, Eric has constructed another alternate from only the pieces found within the 42100 set; this spectacular Liebherr PR776 bulldozer.

Packed full of working functionality including remote control drive, steering, accurate blade and ripper mechanisms and a highly detailed exterior you’d be hard-pressed to know that Eric’s ‘dozer is a B-Model. Best of all Eric has made his design ridiculously accessible if you own a 42100 set and you’d like to build it for yourself, with downloadable instructions, sticker sheet, and even a BuWizz profile that you can add straight to your own third-party BuWizz app to control it. There’s lots more to see of Eric’s incredible B-Model build at his ‘Liebherr PR776’ album on Flickr and the Eurobricks forum, where links to all of the above can be found – click the links in the text to take a look!