Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
I feel it's a myth that the original braces offer anything in the way of structural integrity to the forks and wouldn't bother for that reason. They have a load path that adds nothing to the far greater in size and strength fork tubes plus triple clamps. Also the legs are secured to each other via a substantial wheel spindle. The standard bolts used on the mudguard also being too small to assist in the loads you're intending to counteract. I always run a mudguard to prevent it flinging rubbish around in wet conditions, it does nothing more though.
Telefix fork brace on a 400
Had one on 750F1 for years, here it is on the bike prior to the refurb.CheersDennis