Dropping singles from 'Classic Palm'?

Hey guys,
I've only recently gotten into coin magic; I just got David Stone's dvds as well as 'Metal' by Eric Jones.
I have been practicing and can do plenty of routines: coins across, three fly, three fry. etc. etc.
But something that I'm struggling in is: dropping a single coin from 'Classic Palm.'
There are several routines David Stone teaches where you have anywhere from 3 to 4 coins in 'Classic Palm,' but my problem is dropping a single coin. Every 3rd or 5th attempt ends with me dropping 2; obviously ruining the illusion.
So: any advice? I would most definitely appreciate it.
[I know this is a trivial thread, but I would seriously appreciate advice; I'm sure most of you are better with coins than me.]
 
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