I'll accept that promise. 
BTW, how about this; since some grenades shoot particles into the air that can fall down and hurt/kill you, how about you make your next grenade testing area a sort of sphere with a funnel on top. Like this;
Code:
OOOOOO         OOOOOOO
OOOOOOO       OOOOOOOO
OOOOOOOO     OOOOOOOOO
OOOOOO         OOOOOOO
OOOO             OOOOO
OOO               OOOO
OOO               OOOO
OOO               OOOO
OOOO             OOOOO
OOOOO           OOOOOO
OOOOOOO       OOOOOOOO
OOOOOOOOOOOOOOOOOOOOOO
That way it will be even more effective. BTW as a personal opinion of your last map I liked the way it was all very "clean". Fits my idea of a test level. A new version will be cool. Happy mapmaking to you