I just kind of didn't like the original version as much as I wanted to, and this Soundwave model does have an openable chestplate (not to mention I had him hitting the wrong button, derp…) plus the adult shader definitely helps the MMD side of things, I made the original before I started using it…

I don't remember who made this particular soundwave model, but I'd recommend this one instead http://yorozubussan.deviantart.com/art/MMD-Soundwave-DL-378477987

As a side note, only rumble was done in SFM.