I am not a Corbin lover; quite the reverse. I admit they may be nicest
looking bike seats ever made, but not the nicest
sitting seats at all. But this is a personal thing, and many say they love them.
I had several Corbins (bought new and came with bikes purchased.) None of them ever broke in one iota no matter how many miles/days/months on them, and none of them had a good driver's pocket; I could never get my butt to stay at the back of the seat without sliding forward, I slipped and slided all around on them, and got sore ass on them after an hour. They are how I discovered the Airhawk seat cushions.
The simple trick with a bit too tall of a bike (or seat), is to use the one (left) foot down at all stops technique (right foot stays on the brake pedal). It's really rare you need both feet down (uneven pavement or potholes, or high cross winds). It's just a habit that is easily changed with practice. With both feet down, it is common for the bike to shift right and left as you sit waiting to go, but with a slight left lean on the left foot, it says solid in one one position until you go.
I know many have used PS 412s on their Valks. I've called PS on the phone and got tech support and had excellent help and assistance on fitment, and the right model number to order. My 440s came with a bag of bushings, and you just had to pick the right stuff from the bag for a direct Valk bolt up.
That is one sharp bike Pancho.

I like custom work a lot, but I'm afraid I'd snap wooden floorboards off my first ride. My Cobra boards have a built in pivot (up) in them, no spring holds them down, only gravity. When I drag them (every ride I take), they tilt up (with my foot on them), though in hard turns, I tend to lift my foot off them an inch or so, so the pivot doesn't distract my attention forward.
One other thing about 12" shocks. When departing concrete aprons from business to street, a lean on the apron to turn into the street will increase chances of dragging your exhaust (lowest part). Though I know nothing about Cobra exhaust, except the noise and drone riding near them. The first time I rode with a group of them, all their drones seemed to synch up together, and I thought my bike was blowing up.
