Bracelet manipulation tools

Hi,
I would like to try my GM bracelet with additional link in it (would like to see how it would wear if I little loosen it) and it looks to me as straight forward procedure but still I would like to ask what tool to use for it (ordinary small - precision screwdriver or something special?) and is there anything that I should know or take care in that process?

Is it really just unscrew -> add link -> screw again back ?

I could take it to watchmaker in my city but they always asks me to leave watch and return later, which I don't want to do as I maybe would like to return to previous length and it would mean that I have to go there again. Not to mention risk of scratching my watch.

For one, the screws probably have loctite in them. So you’ll need to heat up the screw you are trying to remove to loosen up the loctite

Further, you might have to purchase some low strength loctite to add to the screws once you are ready to install them again.

I haven’t sized an omega yet, just a Rolex datejust.

I've found a 1/16 screw driver from a Home Depot worked perfectly well, on all the latest generation Omega bracelets I've sized (Globemaster, Speedy, Seamaster 60th anniversary).

Plus, it cost around 10% of a Bergeon screwdriver. I live a few blocks away from Otto Frei, and inspected some of the professional grade Bergeon screwdrivers. As an amateur, I didn't find any noticeable improvements that the Bergeon one offers over the cheap, off the rack screendriver from any home appliance store.

As for things to watch out for:
1) Move any pets out of the room when you're doing this? In case a screenhead drops to the floor, you'll want to conduct your search for it in a controlled environment.

2) The GM bracelet is so heavy, that it might actually make the bracelet less comfortable because you're adding weight with each link. I prefer to swap out the bracelet entirely during the hotter months of the year.

3) If any particular screw feels stuck, run that link under hot water for a minute before you increase your torque.

To be fair, professional grade Bergeon and others of such standard screwdrivers are their to be used on much finer things such as a movement of a watch for example.
Also, the grade of steel used, the finish on the tips etc, would definitely be better. The price difference is there for good reasons IMHO.
Like many, I've tried out cheap off the rack examples. They are there to be used on simple not that important things. They have their limits.

Just my 2 cents.

Supposedly, with better screw drivers both toughness and hardness increase, so the blade will neither snap/break nor twist/corkscrew as easily. I haven't had a blade snap, but I have certainly seen corkscrewing happen.

I don't know whether you necessarily have to spring for a Bergeon or Horotec tool. They are priced commensurate to Omega watches though. A nice screwdriver set is about the same price as an Omega clasp.

Also supposedly, you can use Bergeon replacement blades in other screwdrivers.

And furthermore, often you need to shape the blade to fit the screw slot, so just because you buy a more expensive tool doesn't mean it will fit better without taking a file to it.

A mangled bracelet screw (or mangled bracelet) will usually be more visible than and just as annoying as a mangled movement screw.

In my case, the answer is yes.
And I was just becoming competent at my old Omega "pin" bracelets... My latest Tudor came with screws... I grabbed a screwdriver, unscrewed, removed a link, rescrewed, job done!
What surprises me with the comments, and I will state I have no knowledge, but would Omega ship watches to AD's, with "locktite" in situ, knowing that the employees in such AD's, will have to remove those pins to size the bracelets for 90%+ of their clients? Or is that a job, now for watch makers only as a flame is now required? Curious.