That kit looks good.

You could round of the corners of the heel of the neck to address the gap between neck and body.

If the grounding wire hole isn't going to be seen or re-drilled, I'd just use wood filler - that's what I did on my TL. Having said that, if the filled hole is going to get in the way of the string through holes, and make it more difficult to drill them straight (because the filler might cause your drill bit to wander, given that it's softer) you could drill it out to make it big enough to dowel and glue.

With this model, you will presumably nee to re-drill the ground wire hole somewhere more convenient, as you will need to ground the bridge.

[Edit: Sonic beat me to it.]