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Great job on the padding Wayne. Note though that this was a 'slip on' item, with a 'sleeve' which slipped over the back of the seat. This can be done by adding a paper sleeve, or by blending the edges and painting, but no doubt you'll do the job without problem.
And yes, the wooden block flare rack had normally gone by this time; it's probable that Tamiya used a restored example on which to base their kit design, which might have had the rack erroneously fitted, not uncommon on some restorations.