Thanks for the comments guys. He wasn't bad to put together thankfully. I just picked which arms and head I wanted, played around a bit and then glued them in. Some work with blu tac is recommended to find a combination and position for the arms before gluing. With 9 arms in the two figure pack and two different heads I think there is plenty of scope for customization. I just placed him next to a Foundry German and he is bigger for sure but I'll try to do a comparison shot for you tomorrow if I get a chance.
Oh and good one Mephysto, the modified song is firmly stuck in my head now too!