I appreciate the help, guys! I read that post, thanks for the link. Good point about the school bus, I feel like a right wally! I don't have a power hammer and this is just a hobby for me so mainly light work. I'm having a go at a viking spear with my friend in January. considering all I've made is a dragon twist beer tap handle and a pair of bolt jaw tongues, the spear head will be the biggest thing I've made.
I think I'll take it. What I've got has no rebound across most of the face and weights probably a tenth of the steak anvil, so although it's not that stout compared to a "proper" anvil, it is relative to mine.
Thanks for the advice!