If you do get this stoker, look at the retort (firepot) and you'll see how heavy duty these parts of the stoker need to be.
Not trying to dissuade you from doing this but I do think it will be quite challenging to get it to function, especially long term. If it didn't work out, you can set it up the traditional way as Greg suggested
LsFarm wrote:make a flat refractory area around the firepot
for the ash to collect on and get melted to clinkers for easy removal.