I was tempted by another small petrol stove. It's a Shinabro 170GR. Looks like it hasn't had a lot of use. The SRV is loose in the cap seals are hard so it doesn't hold pressure. Time to buy a penta-tool. It looks to be a well made copy of the 8R.
That is a very nice stove @gnome, I have one also though not as nice as yours. They are solid and well built Here is a link for the pentagonal drive bit. 1/4" Hex Shank φ Five-Point Star Screwdriver Robertson / Triangle Types Bits Set | eBay I purcased two of them, they took a little bit of time to arrive, but they fit perfectly. The B1 pentagonal 3mm size is what you want.
They are definitely great little stoves. I've had one since new and they're rugged and work well. Just stay away from regular unleaded fuel!
