[Amps] transistor mounting question

[dan]

All, I am attempting to mount a new power module on an existing heat 
sink. The transistor mounting holes to not quite line up. Is it 
practical to machine the holes about 1/16 inch without destroying the 
transistor. The transistor is an ST TH430 NPN.

The alternative is to 'move' the entire module on the heat sink and 
drill and retap all the mounting holes.

Dan