Notes & Combos
You could consider running 3 Ghost Belle the ideal cuts to make room for them would be a Saronir/Void Apocalypse, Chain Resonator and Atrii.
Overall I felt like I had a pretty easy time since I never had a reason to worry about Kewl Tunes being a Synchro Deck Myself, I also only got Fuwa'd once and still won that game, however the biggest issue the deck faces is Droll, Had a lot of 4 winstreaks ruined by Droll or more specifically Skystriker that went first and then drolled me.
Hardest Games I had was going 2nd into Skystriker & Radiant Typhoon, generally never had any issues vs either deck when going first unless I got drolled.
Replays
ID is 288-000-463 I usually keep some Wicked replays of resonator decks in action as public trying to keep new replays coming every season while slowly clearing out the old ones.
If you wanna watch more you could try to look me up on youtube youtube.com/@Archimo