Here are a few mods I tried for a more stable hi-speed experience:
The skidmarx windshield is slimmer than stock, and that way it has a much smaller lever for shaking the handlebar in case of wind turbulences. It still protects the upper body nicely.
Triumph Rocket III - Custom Cruiser Screen - Skidmarx UK Ltd
That Longride panniers are smaller and slimmer than Triumph bags, and they have a forward facing edge that breaks the wind nicely. They are removable as well.
34 Ltr Synthetic leather rigid saddlebags with studs - Longride
My Wilbers shocks and fork springs for the Rocket make the ride a tad less comfortable, but improve stability over 100 mph considerably.
WIlbers America Home of Wilbers Shocks
Which other mods would be interesting for speed heads? What are your mods so far? Any contribution would be appreciated.