In reply to:

you have to wait for the glow plugs to go out before you start,


Exactly. Since installing a second drive, booting is now faster than the glow-plugs, so it's easy to respond to them finishing instead of waiting an additional 2 or 3 seconds for the player.
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Toby Speight
030103016 (80GB Mk2a, blue)
030102806 (0GB Mk2a, blue)