All good, it was just an updated thread-dig since it had been a while, there were a few new products on the market and time for the previously new products to get some feedback, perhaps.
During my chat to Steele Rubber they also confirmed their trunk seals were hollow as per original GM, the rubber type, not the latex covering. I noticed several ads of the same showed profiles of solid rubber seal using stock photos which are apparently not correct. In theory these will compress better than solid, always check that's what you are getting if ad photos show otherwise. Might find, yet again, it's very old stock when done differently, or is not the item being advertised.
I have a NOS hardtop roof rail hull seal here, only one side though. I also have a barely used Metro or Soffseal set in box, if comparisons are of use, probably for conversation more than anything since it doesn't really change anything. The Steele Rubber set I have are for the doors, not the body.