I don't use any wood - I have all 5 springs installed, and tightened up pretty good, and the bridge screwed down hard (using the spring force, not the bridge to determine the flatness against the body). There are arguments about how the jammed-in wood adds magical, if not hallucinogenic properties to your tone. Mmmm, well, bridge against body, springs holding tight, etc etc...good enuf for me.
The best trem I have currently is a draw between a Gibson Vibrola and a Duo Jet Bigsby....the Gibson nudging ahead. Man it's amazing...light, but tightens at the touch, and doesn't detune at all....shame no-one believes me, these Vibrola's are cursed or gifted....mostly cursed. Where's TMG03 - what's your view on Vibrola's - I know you got one.

"Man is the most insane species. He worships an invisible god and destroys a visible nature. Unaware that this nature he's destroying is this god he's worshipping." - Hubert Reeves