What's the consensus on Swanson Fireball HOT (#H30) R/C Glow Plug (LONG)s for use in stunt engines, primarily newer ones. They're about half the cost of TT, OS and all the other recommended brands. 

So no one else has any experience with these? The company states they've been making glow plugs for over 50 years and that, among other things, "These plugs perform equivalent to the O.S #8 in all 2 stroke and 4 stroke engines running low nitro (5-20%) glow fuel."

At $2.67 shipped (12 for $32), are they worth trying?

The seals used to leak.  We used to go to a lot of bother putting high-temperature glue on them to get them to work. 

Thanks, gents.

I'm crashing at a pretty regular rate, which I expected, but the last one I thought I could at least salvage the glow plug but my T Bolt plug filament is warped from the impact and I don't trust it. 

I decided that while I'm destroying aircraft at a regular rate, I'll save the expensive plugs.

I've been using the standard (CL/FF) non-idle bar plugs for a while, red hot bot long and short, and they have worked for me. However, I have found at least those, which I purchased 15 years ago will work for a while then go sour. They might be 20+ YO stock. Seems once they get coated with Castor, lose some of their catalytic action. Might be that the catalytic metals have degraded in them.

I've heard that their new ones are good, although I haven't tried them. Have a card of a dozen medium yellow idle bar long I bought not long ago, yet to try. Might give them a shot next time I fly.