The last time I tried a 705 front, it was cupping badly enough at 11k miles that I got rid of it.
That was likely because I wasn't using enough pressure. Not knowing any better, I used the swingarm sticker values, which were too low. By the time I knew correct pressures, it was too late.
I'm now over 15k with a Heidenau K60 Scout front. No cupping. I've been running it 1 PSI below max (per sidewall marking and discussion with Heidenau), which seems to work.
Finally getting down near the wear bars. Thinking about trying another 705 front, but running at proper pressure (supposedly 36 PSI). Nothing wrong with the Heidenau tire, but the 705 is much more affordable. I'm not a big enough dirt/sand/mud rider for the tread difference to matter.