For those in need of a letter scale. I really like the real-world-use-things and couldn't find a letter scale on thingiverse.Thought about adding a scale, but it will be too dependant on printer settings, material and counter weights, so just use a (semi-) permanent marker for this.For the small scale I used mr alligator as a letter holder: http://www.thingiverse.com/thing:13612 Had to "fix" it using Netfabb before I could import it in OpenSCAD.I've also uploaded a version2, the largest I can get it with my 180x200mm buildplate. I've made three stl's with all the parts to print. The black & yellow scale is version 2. I recommend to make the weighing platform a little thinner, so it won't need as much counterweights.Made it a work in progress again, I think it's better to shorten the arms holding the letter plate. I would like the big scale to be good for 250 grams. Make the scale more stable by moving the foot to the heavy side.For the final version 3 I added some stability by moving the legs to the heavy side of the scale and making them bigger. I added another arm to hold counterweights so these are balanced. Smaller connecting arms so it can take more weight, but also makes it much more stable.Print, assemble and calibrate, You can print the parts seperate using the .scad file or print the build plate (173 x 173 mm).I used pieces of 3mm PLA for the rod connections, fixed them on side using a solder iron, other side push fit.I used an m3 bolt to mount two M8 nuts as counterweights and an m5 bolt to use as an adjustment screw.For the big ones I used four 608ZZ Bearings as counterweights.