I have the Tier 5, 6 and 7 researched, as I had squirreled away a bunch of UK blueprints. I have not purchased the 7. Which is worth spending my time and hard earned silver on and developing the crew and field mods? For some context, I only have a few games in the Staghound and found it underwhelming. I tried the Concept 5 on the test server, but it was such a mess in those games it means nothing.