[TowerTalk] best way to free a thrust bearing set pin ( allen nut )

[Bill NY9H]

moving my tower  gave me a chance to change the 2800 mast clamp to 
the one from XLC.

It does not use the mast centering "pyramid" so i need to shift the 
thrust bearing, so the mast sits on the 2800 plate... otherwise it 
would be hanging on the unbolts on the mast clamp....

trying to let some fine oil loosen it up tonight,,,,

any great ideas how to convince that little 3/16 i think allen nut to 
loosen up ????
and if it does not , do i have to drill it out ,....????tnx

bill /3