I was thinking of doing that but didn't know if I had the skill. I'll finish my temple guard first, and then give it a try
Its not too hard, and its only a small part of the model, so its a great thing to try as a first go at scultping something. I dont have any WIP photos, but basically, the key it to sculpt it in stages - dont try to do it all at once,or it'll be a mess.
The other thing with greenstuff is that its maybe better to leave it for 10-15 mins after mixing together. It'll be a bit easier to work with. OR just use brownstuff. Its like greenstuff, but less sticky. I find it much easier to work with.
1) Glue together the bits you have - I was able to glue the spare chest, two arms and a head together as one unit (with a few gaps and a big hole at the back, and then the two spare walking legs are just separate pieces.
2) Using bluetac as a temporary body, pose and arrange the legs and body on a base as you want them. Try out different positions for the tail. When happy, glue the feet down and remove the bluetac & body.
3) When the feet are secure, use a blob of greenstuff to fill the void for the hips and back of the body. Dont fill it out completely - leave it a little shy, and dont worry too much about the appearance, we're going to add a surface layer of greenstuff later. Potentially, you could add the tail at this stage, or just embed a little piece of paperclip wire, as an anchor to secure a tail to later. Let this greenstuff cure overnight.
4) At this stage, you have a solid model, with no back detail, and potentially no tail. We now use more greenstuff to fill out the back to surface level. You can then use a wet tool to smooth this layer out (removing finger prints, etc), and you can draw some rough scale patterns into it. It doesn't need to be perfect, we're not trying to win awards. Just keep the tool wet, and make some kind of lines. You can embed some spines into this, cut from a spare saurus body (you probably have a few cold one rider bodies spare), or sculpt some if you are feeling brave.
5) For the tail, you can sculpt one completely, or chop one off a spare saurus body - again, i had a spare knight body, and I robbed the bottom part of the tail. I secured it to the rest of the body with greenstuff and added some rough scales.
6) Let it dry, prime, paint, no-one will ever know at a tabletop level.