If that's the aim, growing duck feathers might help
I like the MSR Hubba or Hubba Hubba tent, but these have twanged up in price since I got mine. Anyway, you need to do something with a lot of 3-season tents, Hubba included, to make the tub a bit deeper in the inner tent to avoid splash back from Welsh rain. (Mind, looking a the latest iteration online, it seems they might have addressed that themselves already)
I know this isn't going to sound good, but if serious, you might think about the Tarptent Scarp 1. When I get myself together, I will get one, and sell off the others. From what you reportedly get, they sound cheap at the price. About 350usd. With the mesh and solid inners plus the extra poles, it is 500usd. Half the price of an equivalent Hilleberg. The Hubba Hubba is around the 500usd mark.
Also, the Tarptent guy doesn't have any Scarps in stock at the moment .. probably reflecting the fact that covid/stir-crazed Americans are heading outdoors in greater number than seemingly ever before. Anyway, it might give you a chance to save. It is thought of as a proper 4-season tent, that can legitimately pare down to a 3-season, or a 1-season. Ridiculously flexible item of kit, and interesting as much from an intellectual as a practical point of view.