Help with Bolt Knob modification

A long time ago I sent my bolt handle (Remington 700) to Badger Ordnance so it could be modified to accept their Tactical Bolt Knob. Well, recently I decided that I would like to switch out the bolt knob for a carbon fiber bolt knob. After removing the Badger Ordnance bolt knob and putting on the carbon fiber one, there is approximately .17” of exposed thread on the handle. Now, do I attempt to grind down the bolt handle or lengthen the inside of the bolt knob by drill/tap? Or is there a third option that I am not seeing such as filling in the gap with JB weld or something? Any advice would be appreciated, thanks.

I would prefer not to modify/shorten the bolt handle for fear I would do permanent damage.

How about making a little sleeve that would cover the offending threads?

I would drill and tap the knob except there does not seem to be a cylindrical section on which I could hold it.

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No idea, since this obviously worked.

The threads on the handle don't go all the way to the shoulder. Make sure the new knob has a counterbore in it to clear that, like the old one has. If so, check the depth of the hole. If that's good, tapping it deeper should take care of it.