Yamaha DTXpress/DTXplorer/DTXtreme

ok, i've been posting some really unhelpful questions to this group,
and i apologize. but this will be my last stupid question for awhile.
i'm thinking about putting some big round stickers on my triggers.
would that affect the sound? has anyone does this before? i can't
really see a reason WHY it would cause any problems, but i don't want
to do something totally retarded to my beloved dtx.