So I got the rest. A Gong shaft and handle. It fitted easily.
The catch of this blade is amazing. Thats what I really noticed at first. Went a bit too long as I was worried about cutting it short. Cut 3 cm off and it feels much better. I struggle to get the shaft vertical if the shaft is too long. I also put some rail saver where the shaft touches the board. I really find touching the shaft down the side of the board helps tracking.
Its under 500 grams. One scale says 470 the other says 485?