After a bit of random searching on the eBay, I picked up a Tau Devilfish cheaper than shop price (around £16). My idea is that I’ll give it a decent colour scheme and apply weathering as per the Forge World masterclass book. If I’m happy with it then I might even buy a different FW weapon turret for it. I’ve not yet decided on a decent colours scheme, but possibly a pale blue/purple one, almost cloud like. However light purple can have a habit of looking like pink, so a bit of experimentation is required.