[TR] TR3 Seat wood strip

[wbeech at flash.net]

I have the TR3 seats stripped down to the frames and need to replace the
1/4" x 1" wood tack strips.  I purchased some 1/4" plywood at the local yard
but after an hour in the steam box the wood still wants to crack.  I have
experience steam-bending solid wood but not multi-ply pieces.  Is there a
secret to replace these strips?
 
Many thanks,
Bill
 
Bill Beecher
'62 TR3B TCF/2549L " Aunt B" (in rehab)
'67 Morgan 4/4 Comp (next in line)
'68 Land Rover Series IIa 88" "The Beast"