You're certainly right Gary - delivery to your target audience is all - but if you can do it live rather than pre-recorded just think how much better you feel at the end of the evening...
I'd rather do that than think I got a repeat booking cos I knew how to play someone else's midis or sequenced files - it's a matter of personal pride I guess.
Anyway Gary your work is marvellous so you've got no problems...
Best wishes - Rog