heres mixmaster. he was the first one i started with and im still not 100% done with him. just like scrapper the primus piece is basically a cap so longhaul has something solid to stand on and connect to in devy mode, and it sits on his back in robot mode. the cab section is from universe inferno with a tru toy semi trailer cut up to fit around it to give a more closed-in look. the last pic is the other alt mode i came up with he's a concrete cannon to guard the energon base the all form.