Everything I make that's not stock or DSL will go in here, unless and until there are more official showcase sections.
For starters here's my second Space Arena bot and my first semiserious one (the first was pretty sloppy, just putting stuff on 'cause it looks pretty and shiny).
Meet Dr. Device. (Named after the Molecular Decomposition Device (M.D. Device) from Ender's Game)
799.8 kgs, 3 ants... er I mean power cells, 1mm titanium, 14 stacked fury blades (or whatever the harpoons were called... can't remember exactly).
As you can probably guess, it's stupidly powerful, and also stupidly unstable. I wish I had more AI opponents to test against because Flail VS is too fast and doesn't let me spin up.

(Although Dr. Device can still beat it, it just doesn't get any full-force hits in.)
Mission to make ridiculously overpowered bar HS: success.