A very good idea in theory.
However, one serious thing concerns me greatly and I hope I am not the only one who has noticed this:
At no point in your pictorials did you actually remove the bushes from the wishbone arms themselves...
So when you have drilled the alloy, what happened to all the alloy swarf and shavings that dropped into the hole and onto the fresh bushes?
So now you may have nicely greased up bushes, but... Now the grease is actually suspending alloy shavings in it and acting as an abrasive paste that will eventually destroy the rubber from the inside! Just like rubbing against rubber with sand paper, what will win the wear battle?
If the bushes are removed first, greased up while they are out of the arm.
Then after the drilling and grease nipples are fitted, all the swarf and filings cleaned out thoroughly before refitting the bushes, then it is a good fix to do.
There is a an easy way, and a sensible way... It's pointless going to all that effort if one missed procedure is actually going to accelerate failure...