After a little more tinkering, I have finished off the digital parts I sculpted to customise the original Space Hulk terminators. These include a vent piece to fill in the huge cavity in the model's back, and a cyclone missile launcher that fits on over the aerial mount.
![](https://www.underthecouch.net/couch/wp-content/uploads/2022/01/SH-Terminator-Parts-Printed.jpg)
If you would like to spruce up your own ancient Terminators, you can grab the STL files from the new Downloadable STL Files section.