Fozjared,
You can certainly run a bolt through a starter cone and chuck it up in your drill. I''ve always found that it feels a bit ackward though, its not as easy to apply straight pressure on your spinner. If your starter is heavy enough you could just try your 18V battery and see if it will crank over using your current starter. I use an old sullivan with a 19.2V battery out of my drill. It easily starts my conversions. Obviously if it gets too hot, it''s too much battery......m