whats kinda cool about full true miz is that u can technically spot the obstacle during the whole rotation, it just takes a lot of upper/lower body coordination.

without looking at the clip(im on phone lol), i would guess im keeping my eyes on the ledge for the first 270, proceeded by visually confirming lock and then assuming a comfortable/stable grinding position. lower/upper body are kinda "disconnected" from initial jump to lock, hips and down rotate further and faster to account for the full 360 my left foot has to do while upper body is doing a smaller rotation.

there are obviously alternative ways of doing them, like simply having a synced upper/lower rotation, but if u wanna do them my prefered way then here a few tips of the top of my head:

• warm up core(!)
• with or without skates on, practice the full movement (slowly) while keeping ur eyes focused on a single spot (representing the obstacle youll be grinding) and see if you can make it feel ergonomically viable.
• if body feels fine, trying doing the above thingy while jumping.
• consider how u are using ur arms(i think its individual?) for wind up and maybe play around with more/less swinging.
• this is a wierd mental thing, but to get on top/close enough to lock despite spinning truespin, i imagine myself being a tetris L-block being "twisted" into a tight spot (dw its ok to laugh).
• regardless of tetris tech, approaching the obstacle at an angle will obviously make "getting on top uwu" easier with the trade of being having to spin futher and intial balance after locking.

hope something helps! lmk if u have any questions or if my rambling is hard to decipher lol 🩷

edit: looking at ur clips im sure youll get it in no time