So here is how I magged my 2 Fathom 30's.
Bear in mind, due to its design, there is very little clearance between the spool and frame.
I had to use very small magnets in order to make it fit.
The magnets I used are 6mm x 1mm N50 Neodymium magnets.
Basically, I took a very small zinc coated washer and cut in 1/2 to use as a magnet mount.
Instead of epoxy, I actually used super glue gel (this seems to work just as well for this application) to affix the 1/2 washer to the inner reel frame.
For the 30's it took 3 magnets to get the control where I wanted with my setups. The reels centrifugal brakes can be adjusted to fine tune the control as well.
Since I use Braid and mostly fish longrods at night, I wanted as much control as possible without sacrificing much distance.
Mine are tuned to the point that I don't need to thumb the spool until right before splashdown 9/10 casts (assuming no wind).
If the wind is in my face, then I need thumb more often due to the increased deceleration of the payload.