It's a good idea "for all 2.3 owners, I think" to grab the firmware before it is updated so you can revert to the original 2.3.0 firmware incase the camera fails to boot. I've already had to do this once.
Make sure you are not in RNDIS mode and apply the firmware with FLIRInstallNet.exe
It takes a while so do not unplug or interrupt the process until completed. Also make sure you have the drivers installed, they can be found on page 1 of this thread.
I did not think to take copy of firmware. My only option I think is to do a "software upate" ( if it lets me) in Flir tools. I am not planning on reverting anytime soon, but it would be good to know.
My lens from china turned up, and also my lens holder I found on thingverse
http://www.thingiverse.com/thing:407201 and had printed locally. I also did a comparison with our existing Fluke Ti10. This is not scientific test or attempt to make comparison, just the best we had before and the reality of what we can do now with the Flir E4. Enjoy:
Before and after. This is picture of laptop power supply. You can see before picture was soon after turning on laptop. After upgrade, power supply was much hotter. Note, this is a cheap poor quality power supply purchased for like $10 on ebay (delivered from china!) for my old laptop. It is very dangerous as it gets very hot >80degrees C. I also had to add extra insulation inside. Beware buying "cheap". I never leave adaptor unattended.
Noise generator makes me very angry.
Upgrade makes me happy.
Upgraded Flir compared to Fluke ( remember not fair comparison as stated above, I dont want to get into discussion. )
3D high Res ABS printed holder (100% fill). Found on Thingverse. I searched for Flir E4. Nice solution, but not sure it is the best ( we like it though ).
Lens in Camera.
First samle image. 20mm dia, 50mm focus as recommended by mikeselectricstuff. Lens purchased on eBay.
0805 resistor in top left running at about 30 degrees C. I think we will get better with more practice, and maybe better lens placement, but this is now useful tool for us.
Note: Image meta data removed/replaced/edited and images grabbed with screen tool. Do not trust image dimensions or metadata. (not paranoid, just careful)