Hey, thanks for reply, and upon further inspection I found that I didn't need to adjust the truss rod, (thank god). Also that it's a dual truss rod (which is good to know for future reference)
It's this model here but a 5
http://www.trabenbass.com/array.php
Managed to reduce the buzz through raising action and with minimal effort really, it's not completely gone but I reckon your last wee trick should be the final push needed to get rid of the buzz