How to play with 40/100, SD/30 d10?

One of the clocks is a LEAP PQ9903A, the other is the Chess Armory Digital.
My other thought is to use one of the cell phone apps, but I have no idea which of those would enable me to set it quickly without fiddling with it during the game

One of the clocks is a LEAP PQ9903A, the other is the Chess Armory Digital.
My other thought is to use one of the cell phone apps, but I have no idea which of those would enable me to set it quickly without fiddling with it during the game
For the Leap, it looks like it can do custom settings
https://senseis.xmp.net/?LEAPPQ9903A:v6
Use setting 24 as the base, but you'll have to use increments. If the tournament is US Chess rated, that should be allowed, though if there is a more compatible clock, the TD will probably want that one used.
As far as I can see the other doesn't support multiple time controls so can't be used.

I ended up buying a new clock. The tournament did not allow cell phones, even when on airplane mode, because it was too hard to casually look at the cell phone and tell it was turned off.
I wish the tournaments would settle on a few standardized time systems. It would make things easier for clock manufacturers, and I was not the only person at the tournament struggling with an odd time control.
My son is playing in the Orlando chess tournament this weekend with a 40/100, SD/30 d10 time control, but neither of our clocks allows that as a single setting.
(One clock allows 40/100, SD/30 with a bonus instead of a delay, and the other clock considers that two separate settings.)
What is the best thing to do here? It seems like the only correct thing to do is to manually add the extra 30 minutes to the clock after 40 moves, but it seems like that would be distracting, and prone to mistakes. Is there a better way to do that?