Instead of using a twin lid design- you could have one lid- but then have ‘cover bars’ over your langstroth frames. I found a great video of a horizontal hive design using langstroth frames. With these cover bars you only have to uncover the specific frames you want to look at- and you can control ventilation, etc.
here is the video
More simply you could just have two covers- roughly one for the brood and one for super- but I sure like Joe’s design!
there is a second video showing an inspection, as you can see there is minimal disturbance to the hive. It seems like it would be great to be able to inspect the brood anytime without removing any super: