Haven't tried it with the leather case on but I think it should not be a problem.

You should :)

Less than USD30 for all the storage box, TPU soft case and tempered glass screen protector.

Me too. I have the same leather case and all the dust plugs. I am now waiting for my clear TPU soft case, carrying storage box and tempered glass screen protector to arrive :)

You're welcome.

6.5cm x 12cm

Thank you :D

Thanks for sharing your experience. Between Kato and Hana 2021, which one has better bass quality and quantity? Will it be suitable for music genre like Instrumental, Soundtrack (orchestra), New Age and Smooth Jazz?

Thanks for the info! I have the R6 2020 and currently using FH3 (on 4.4mm balance output). Thinking of upgrade so I am not sure if the Olina (modded or not) will be a side grade or upgrade over the FH3. As for the Kato, most reviews say its bass lacks punch/weight. Oxygen has short nozzles and...

Which is your most preferred IEM among Oxygen, Kato and Olina?

I see. Glad to know that :)

Normal? But it doesn't happen to other music app even though playing the same file to file. It's kind of annoying and sometime it was loud that it ruined the music listening experience :(

I have the same problem with Hiby Music App. Not only for MQA but FLAC file changing khz, eg: 96k to 44.1, 44.1 to 192, etc... This happens ever since day one and the latest firmware update doesn't resolve it. Have no issue with Poweramp and Neutron.

I have FH3, so is FD3 considered an upgrade or?