Hi again Timmo
I've added the reference numbers to your photo's.
Interestingly, your trav hasn't got the strengthener, what year is yours? Mine is 1959 and defenitely had the strengthener. If you had it then you wouldn't see the join line between the sill step/bottom floor edge and the inner quater panel at the front.
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The closing panel is probably stuck to the bottom of the wood rail.
and a pic of my sills before I started.<br>

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I've ended up replacing nearly the whole floor from bumper to bumper, just leaving the prop tunnel.
Good luck, takes time and patience but it's worth it in the end.