*Munches on popcorn and watches the fireworks.*
I'm over here pretty much waiting on KW and B9 to finish myself. Lots of interesting talk about wheels and those new parts look like they took a page out of LLL's playbook.
Then took that page, slapped it on a copy machine, and hit the 'Blow Up to 200%' button. Not sure if 'staple' option was selected as well but I digress. They look nice and sci-fi.
The biggest bother I've had with B9 parts is getting proper gear alignment on some of the angled undersides. A few radial 'undercarriage adapter' parts would make a simple, and sweet addition to the collection being sported here. See here for what I mean. The 'bulges' house the gear rather than stapling them to the hull itself. I could see two benefits from them.
1: You could attach the gear without worrying about the gear housing interfering with the insides of cargo bays. (I encountered this with the stand alone Mk IV parts. The upper portion of the gear bays extended up through the floor of the Mk IV cargo bays.)
2: If the gear are mounted to a Gear Adapter, and you need to move the gear around CoM, you can move the entire set just by grabbing the gear adapter.
Though, maybe some of the new parts can double for that. Depends on the shape. I know I ended up doing that when I was building a C-130esque design a month ago. Used Firespitter fuel tanks and tail sections for their rounded features and managed to get them to attach after an hour fighting with them. Mounted the gear to those, and had myself a K-130 parachute probe dropper.
The pain was finding Point of Rotation for the aircraft. Odd how center mass isn't when it comes to gear and the point of rotation.