I've been working for a while on a whole gunge tank kit, you might have seen my gunge tank valve that I currently make but have been looking into building the whole thing. My main question is how much would people be looking to pay for one. Right now it would be uk only but with postage I think a full tank kit would be around £650. This cost could be brought down a lot if people were ok with cutting some pieces of wood to length as they're the most expensive parts to post.