I’d make the same decision again in a heartbeat.
It took me roughly 3 very lazy hours of listening to classical guitar YouTube music videos to do the install on my Ramirez Estudio 3, probably only 30ish min of that being for the tuning machines. Capitalizing on the opportunity, I took the time to detail, wax, and polish the entire guitar. I also polished the frets, oiled the fretboard, and changed the strings. I really do love this guitar.
The two outside holes on each side matched up perfectly with the stock machines. The two middle ones did not, so I needed four new holes. I may not be a luthier or carpenter, but I do think anyone could be capable of this install if they are careful.
The screws are self-tapping, however, I felt more comfortable using pilot holes. To make them, I held the machines in place; spotted the hole centers with the 1/16” drill bit I was using to make the holes; moved the machines out of the way; then drilled most of the length of the screws by twisting the bit with my fingers.
I decided not to use the cordless drill when I found how easy it was to make the holes without it. I also put tape on the drill bit to mark my depth so I wouldn’t go too far, as well as made sure I was drilling in as straight as possible.
Lastly, I held the tuners in place, ran the screws in evenly using a properly seated Klein 32614 screwdriver as to not mar the heads, and made sure not to over-tighten them and strip the holes. It worked great.
The result was beautiful and perfect.
I will say that there was nothing wrong with the stock tuners and these are only a minor upgrade, mainly aesthetic (my primary reason for the change). It is also noteworthy that Geoff had made me aware of as much and explained what was necessary for the install before shipping them to me, making sure I still wanted to go through with the purchase after being informed.
He really is the best.
Best damn tuners, quite awesome too look at too.