The pivot hole in a frizzen is a tough repair because the hole is relatively deep and the foot is small. I would call Jane and see if TRS will sell you another frizzen (mabey a new lock plate too) When I drill frizzens, I fit the frizzen to the plate and use a small 'c' clamp to hold things together. Very carefully mark where you think the hole should be and where the hole will emerge so you don't break through the top or bottom of the bolster. I drill from the outside of the lock and I use a drill that is smaller than a #4 screw. You dont need to drill through the whole stack in one shot but be sure to touch the frizzen foot with a full diameter of the bit. Take everything apart and drill the rest of the lock plate then the frizzen foot. Now you can reassemble the peices useing the drill bit as a pivot in order to adjust the final fit, then enlarge the holes to accept the screw. Don't sweat getting a few new peices, Once you recover from a given mistake you probably won't repeat it and once you have figured out some of the tricks specific to the task, the builds get "easier"