Quoted from Jarbyjibbo:
There are no other pins from the generation with these coils that have consistent lengthy games. They overheat because of the long nature of each play through. And that it's fun as hell and you never turn it off doesn't seem to help things either. Save yourself some time and trouble, buy the coils for $20 and cease to worry about it every again. I messed with fans but in the end it was still some janky contraption that would move and slide out of position regularly. Plus you have to wire them up and fiddle with that. I personally think replacing a coils is very easy compared to wiring an aftermarket fan set up. The ring shot is much more reliable with the med coils which is appreciated in DTR.
Quoted from AUKraut:
The mediums are just a touch stronger than stock and nowhere near as strong as the PInballLife coils. The best part is the mediums don’t start getting weak as you do have that long game and need to Destroy the Ring.
I up-voted these 2 responses. I would say same thing. Much better IMO to replace the coils than to muck around with fans and connecting them.
Previous owner of my machine installed PBL coils:
https://www.pinballlife.com/lotr-special-flipper-coil-090-5020-2ot.html
The PBL coils do not get weak after long games. They are powerful.
The only real problem shot is the Gimli VUK from the left flipper. Clean shots can go right through to the pops or beyond. Sometimes they only go a bit above, and fall back in time to be registered as a made shot to the VUK. I counter this by trying to hit inside a post next to the VUK from left flipper, and hoping it settles in. Or, better yet, backhanding the Gimli VUK from the right flipper, which is very makeable.
It may be that we get more bad bounces off targets or posts to drain, but I cannot quantify that.
Finally, even though I have a relatively new post sleeve on the pin behind Orthanc, we sometimes get orbit shots that will bypass the pin when it's supposed to divert the ball to Orthanc. This may be a result of the PBL coils, but I don't know.
I will say, that the PBL coils are great during Destroy the Ring. Being able to easily (well, not easily, but maybe "somewhat more regularly") make the ring shot from either flipper is nice. My game is set on 2-ball DTR, and I find that even with PBL coils, it's better to use the left flipper on second ring shot. It takes a lot of power and a clean shot, making the left geometry better.
If replacing stock flipper coils, it may be best to use the medium power coils, based on feedback from others in this thread. At this point in time, I don't see the need to replace the my PBL ones. ie, they are also an acceptable replacement, even though they may not be favored at present.
-Adam