I never whirlpool. I tried it once, using my autosiphon to transfer the wort to the primary. The cone flattened out, so I could either leave a lot of wort behind or dump it all in. I hate to waste wort. I'm not convinced it is necessary for my system anyway. I figure that all that material will fall out anyway and I'll trasfer my wort into a secondary in about a week anyway.
I whirlpool and at the end of racking I tilt the kettle while holding on to the ball valve lever. Once I see the first bit of hops/break head towards the pickup tube I shut it off. I loose less than a pint.
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Heros are made 10 gallons at a time.
Kegged/On Tap - Double IPA Conditioning - Orange Ale