My EFW does show up at HID under bInterfaceClass. I am also running the EFW from the USB hub on the 1600MC.

```Bus 003 Device 007: ID 03c3:1f01 USB2.0 Hub
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 16
idVendor 0x03c3
idProduct 0x1f01
bcdDevice 0.00
iManufacturer 1 ZW0
iProduct 2 ZWO EFW
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0029
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 64mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
```

I do have 99-asi.rules in /usr/lib/udev/rules.d with contents:

```/usr/lib/udev/rules.d $ cat 99-asi.rules
# All ASI Cameras and filter wheels
SUBSYSTEMS=="usb", ATTR{idVendor}=="03c3", MODE="0666"
```

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