every Sub rep i have ever bought has been in the pool and in the ocean.
swimming only - never diving.
i have three right now. tighten the caseback and have not EVER had a problem.
I would feel foolish taking a "dive watch" off to go swimming. that would fool no one.
dont notch it.
put the 24mm tubes in it and put it on.
give it a nice tug on each end to even it out and enjoy!
I will NEVER use 24mm straps on my 44mm watches again.
The BIG strap on 44mm case looks sick!
Of course, this is only my opinion, but it matters the most................................to me.