Fallback suffix

I'd like to do the following in the context of the really cool story.content macro: Leads shall receive the suffix "[more]", but only if they appear on the front page. I tried to achieve that by using story.content part="lead" fallback="text" suffix="[more]" (fallback is necessary because from time to time, there is no lead). Now what happens if there is no lead, the macro uses text as a fallback, but still uses the suffix. Is it possible to "turn off" the suffix when using fallback? Any other idea? (The whole business arrived just so contributors don't have to add "[more]" manually... Lazy guys :)