Slam - Novasonic D18 arcade hidden

Pack: S.E.~EXTRA
Predicted difficulty: Very hard 18 - 18.76
Similar charts with Jump, Bracket, Jump run, Solo diagonal twist, 90 twist, Close diagonal twist:
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16: Solitary D16, Another Truth D16, Rooftop S16
17: Nobody D17, Break It Down D17, Slam S17
18: Nakakapagpabagabag S18, Jump D18, Higgledy Piggledy S18
19: Up&Down D19 fullsong, Up & Down D19 fullsong, Sarabande S19 shortcut
20: Rooftop D20, Super Fantasy S20, Crossing Delta S20