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Hi there, This is my first post on Eurobricks, and my modest participation to TC5. I worked with the 8047 "Compact Excavator" from 2009: This set was my first lego technic after my dark age (I could not resist when I saw it in the supermarket). It is rather small (252 parts), but nicely packed with functions for its size. The original B-model (a compact log-loader) is rather cool as well, and uses 229 parts. Building a C-model for this set was therefore my personal dedication to this wonderful set. Here it goes, a snow groomer: Design: I tried to provide as much detail as I could. The blade is full thanks to the (only) two panels from the original set. We also have a front light and a beacon on top. There is a bit of blue inside the cabin to evoke some seats, but no more there, as the space is occupied by the lifting mechanism of the blade. The two exhaust pipes are (maybe) oversized, but this was a necessity for a good playability. Functions: There are three: Lift of blade (left exhaust pipe, worm gear, 24t crown, lift arms) Lift of tiller (right exhaust pipe, worm gear, 8t, lift arm) Working tiller, driven by the caterpillars (12t-12t, 2 times). In addition, the blade is manually steerable (pin with friction). Some view to see the mechanisms: And here is how the thing works: In blue is the lifting of the front blade, in green the lifting of the tiller, and in red the rotation of the tiller. Recycling of parts: The model uses 213 parts, that is a bit less than the original B-model. But well, this is a C-model :) We have three real functions, which is actually better than the A-model! Gears are all reused apart from the turntable (which was not used as a gear in the A-model anyway), and the 20t with peghole. Four 16t are here not used as gears (the ones on the tiller), but the two 12t double-bevel, which were used as knobs for moving the arm on the A-model, are here functional and part of the transmission of the tiller. That's it... any comment welcome. I can post more pictures if needed (although there is not much more to show I'm afraid :D). Instructions are available at rebrickable (Alter-Lego is my pseudo on rebrickable, login was already taken on Eurobricks).