This is not that uncommon.
Trim more off of the top of the front of the fairing and see if it will fit.
You just have to make it work. Some builders cut a slot/wedge out of the leading part of the fairing and bend the bottom up and glass it in for clearance.
FYI: A lot of folks like to install this bottom fairing with screws so it can be removed; however, in the case of the TW RVs, the spring is in the way and it won't come off unless you remove the rudder from the plane.
Good luck.