I actually used the timebomb feature for the pmn ladder. i set it to about 5 minutes so if i accidentally set the max amount, i just wait 5 minutes. Is really useful especially if you're in a non-suicidal map or don't want to leave the room.

off topic- hey the_taker56! its me h3acI_sJ-joT remember me? You're still my idol!! lol.