Oh well dude, you pretty much have it tbh ^_^
It's just a matter of getting your timing down. If you're consistently hitting a particular wrong delay you can always put it in the 'Other Delay' box: that's helped me through almost all of my RNG's :)
And I had a very important question! Which Gligar did you want? One has Sand Veil, the other has Hyper Cutter. Other than that and hatch locations, they're identical.