After moving to California, Grech began working on new material under the name Meatsuit. Demos on MySpace revealed a development of a heavier gothic sound, but in December 2008 Grech announced that his Meatsuit project had been terminated.

Was a drummer for a band Ophelia Torah from early 2006 to April 2007.
Was a guitarist for [a=Lionface (2)] from 2015 to 2017.

Musicians known to have toured with Martin include:

Alistair Hamer - drums (Open Heart Zoo era) (Sweet Billy Pilgrim)
Anthony Bishop - bass (Open Heart Zoo era) (Sweet Billy Pilgrim)
Pete Miles - guitars & keys (Open Heart Zoo & Unholy era)
Keith Lambert - bass (Unholy era) (Vex Red)
Robin Guy - drums (Unholy era) (Rachel Stamp, Bruce Dickinson, Sack Trick, Faith No More)
Tim Elsenburg - guitars (Open Heart Zoo & Unholy era) (Sweet Billy Pilgrim)