Very Nice.
Coinkidink; I have a similar problem with my fork and tank. MANY years ago I fell at speed on Phaedrus I, St Louis Interstate, wonderfull 3 week trip out west, I digress.
The fork stop lug on the left side was bent back a tad. Allowing the fork ear (same as yours) to touch the tank when full lock right. The tree has been chrome for many years, I forgot all about it while building it up again.
The correct fix would be to remove and straighten the lug. This might crack the chrome. Or replace the tree, but that involves replacing the bearings and rechroming.
What exactly did you do? It looks like you drilled straight thru and did a bolt and nut? Was it difficult? Removal of headlight and brakeline T?
Would sure hate to dent my perfect no bondo tank and metalflake paintjob.