The shade tree mechanic who introduced me to this :
pointed out that 95% of seal failures are merely dirt or bugs under the seal.
The Seal doctor just snaps on , and you rotate , so its perfectly aligned, and easier to use ...
( but twice the price .) It fixed my leak in a flash . ....see the imbedded video .
The bottom line is that fork booties , even on a pavement riding Wing are probably a good idea.