Hey Scott - Thanks for offering this service. My garage door spring snapped on Sunday night which prevented me from getting my car out, so I called one of the highly rated Garage door services and they came out the next morning. I was put on the spot to make a few decisions, and in retrospect, I'm not sure if I made the right ones (financially, that is). So here's the rest of the story.
My garage door had the original assembly that was installed by the home builder. The garage door tech that came out said home builders use a small diameter spring (maybe 3/4") that goes inside the tube, because it doesn't require special tools to install. I have an 87lb garage door and this original spring lasted right around 7-8 years, which was about the expected life according to the tech. He said that size spring was rated for maybe 10k cycles. He recommended a torsion conversion, which included 1 spring, 1 tube, 2 drums and 36 month warranty on parts and labor. He said this much larger (maybe 2" or 2.5") spring was rated to 20k cycles. But this whole process cost me $463. On top of that, I seem to have lost the ability to do my own repair in the future. I wonder if I could have just had him replace the same smaller 3/4" spring that's good for 10k cycles for maybe $100. And now knowing what spring failure looks like, if the builder was capable of installing the internal spring, then I could probably figure it out from some youtube videos too. The ship has sailed on my 1 garage door, but my 2nd garage door is still on it's original (internal) spring. I want to make sure I make the right decision on that one...I'm thinking I could get a replacement spring for that door online for pretty cheap and be able to install it myself whenever it breaks.
Please help me understand what I gained by the torsion conversion. Because right now, with the benefit of hindsight, I feel like I paid ~4x (or more) as much for 2x the life. Granted I don't have to deal with it breaking for another 15+ years hopefully, but financially this seems like the wrong decision.