Richard, assuming you are talking about the fabricated leather ones, on the alloy end of the brake bisector, and not the ones that seal the back of the hull, then yes, I'd say they are absolutely essential.
If you want your brakes to work, you need to protect the inner workings of the bisectors.(actuators)
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Bluebell
Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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