Sneck, I doubt very much that you're overflowing due to incorrect float height but let's explode a myth in that regard anyway.
You don't need a float tool.
Remove the bowls and rest the carbs on the bench as shown. The floats are now hanging in such a way that they're barely kissing the needles without depressing the plunger springs.
Use a very thin screwdriver to bend the tang up or down to achieve the perfect height, which is when the casting marks on the floats are exactly parallel with the gasket surface. Honda designed them this way for a reason. It's impossible to imagine a factory full of workers who are each meticulously measuring each and every float when all it takes is a good eye and the ability to use a screwdriver.
This float is as it arrived (and after undergoing the full series of cleaning processes and the carbs being assembled.) Setting heights is our final step before buttoning the bowls up. A previous rebuilder installed new float seats and didn't account for the differences in milling depth between the various manufacturers. These are Keyster seats and needles, which is to say that they're high quality parts but he missed this detail so it didn't run properly and had to be redone. (He hadn't prettied them up very well either.)
This is the same float about thirty seconds later (most of that time was in picking up the camera), which I've set to a too rich position on purpose.
This float is right on the money, again perhaps thirty seconds or so later.
Just make sure that you use line of sight exactly at the plane formed by the gasket surface in order to ensure that the float is perfectly aligned and you're set. Plus, give them a few minutes to settle before replacing the bowls in case the metal tang rebounds a tad, which is fairly common if you find one that's way out.
Hope this helps!