I used to run echo crossfire in my bumps, but got tired of having it bog down in the grass, so I switched to .130 shindaiwa quiettwist. I run it in my bump heads, and it wears forever. a bit hard to get through the holes while winding, but other than that, it is great. never had it weld once. you could probably go with .105 and be ok too. unfortinatly, my dealer doesn't stock it, or I would use .105
I tried echo crossfire and did not like it at all...a true monster line trimmer has to have a line that will hold up and gator with the aramid material is STRONG and abrasion resistant...echo is good for for wacker from wally world but that is it...Stihl's commercial green round is pretty good...it does NO good to have a powerful trimmer with huge torque when the line is junk...
I used Crossfire for a while several years ago. I actually prefer the Gator Magnum line though. It's all personal preference.
About a year ago one of my customers, who lives on a corner lot, and kind of on a small hill, gave me an almost-full 5lb spool of .095" Crossfire. He had found it in his yard a few days before. Someone must have come down the hill, rounded the corner and the Echo line just rolled off. At least that's what we figure must have happened.
I hate, and have always hated smooth round line. it just doesn't seem to slice through the grass like square or twisted line does. the tanaka line if very wear resistant, even more so than the shindaiwa, and I would use it if 1. it was easier to get. and 2. if it was a different color than black.