I don't know warmachine models too well, but w/ other models, even outside of GW stuff, if you have a top heavy model, sometime you can add weight to the base to help out.The GW bases have the underside which is good, but I know some models you can weight down by weights on the top of the base and working it into the base. I'd personally try the green stuff and pinning and if it didn't work out try the weights.They can make a model look kinda crappy if not really done well. Bring it in and ask around BG if you get stuck. Hope that helps.