BERNZOMATIC ST900D Mini Torch #019527 This is the answer! I love this little torch! It has limited power but it is light and easy to use + it has a pencil tip that just makes the cleanest solder for silver and copper. It does not work on gold.
I may get another just to have a backup. I am using it 4-6 hours a day.

Short version: The 3 tips provided last a maximum of 10 hours use and must be replaced. They are not sold individually, You must buy a "kit" with all 3 tips ($15 each). The kits are not sold most places that sell the torch. This is a throwaway tool that is not likely to last the 30 hours that your propane tank does....

Longer version:
This is my second Bernzomatic solder tool. The other was a small butane model whose filler receptacle failed. Sadly, Bernzomatic does nat provide any repair or replacement parts for this. So, when I saw the ST900D, I was not too sure about another Bernzomatic. But, given the features, the use of a user supplied propane take and interchangeable tips, I decided to go for it. When I got my torch from Amazon, I read the instruction booklet. I was surprised to see that the tips were stated to have a catalytic element that under optimal condition may last as much as 10 hours use. Since, they make a big deal about it going 30 hours on a single tank of gas, you might think it would be mentioned that your tips won't last that long. I assumed that I could buy a box of the solder tips... but no. The tips are only sold as a kit and that is if you can find it. The is no mention of any of this on the Bernzomatic website. I get the sense that Bernzomatic doesn't actually have any interest in supporting their products. Buy it, use it a few times, throw it away and buy another one. I will be looking for another supplier and may well send the ST900D back to Amazon.

I got this because I wanted more power than my small butane torches have. This is highly recommended on alot of jewelry sites so I got one.

While its a fine torch, its not any more powerful than my butane torches and thats a disappointment. I bought a regular torch and will be giving this away.

I braze using silver solder where my flame must confine itself to about a quarter inch diameter, or it damages the part. My effeciency has gone up from about 10% using a standard propane torch and tip to about 90% with this torch and tip. This product was perfect for my application, and saved me from having to buy a jewelers' torch with regulators at about 6 times the cost.

A good Value. I use mine in making jewelry. It could have a longer hose, but otherwise a sound investment.