suggestions for drilling through hole

[Nebe]

I drill my belly hook swivel hole first so that if my drilling does not meet from both ends, it will at least end up at that hole and you can fish the wire down the next opening after slightly bending it.

I drill on the lathe as well and complete it by hand with a longer bit.
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[numbskull]

You can use a 5/32 bit as well to have less deflection.
You can use an "aircraft bit" (which is only threaded for the first few inches) to get less deflection but you need to clear chips more frequently.
You can also drill on a drill press with a centering pin lined up directly below the bit (drill pilot holes and connect by hand).
They make end grain bits (brad point with spurs ground off) that help (Fuller drill has them) particularly with 1/8 bits.
Some woods (southern yellow pine in particular) can't be drilled well because of marked hardness differences between growth rings.
Swearing is useful.