Might consider buying since locally SRAM is more expensive, just wonder if it would work with Sram K7/Cranks/Chain because I wanted to go 10T

How is the crosscompatibility between Shimano/Sram, can this groupset work with any 12v K7 from them? Also its interesting that I could use the Shimano caliper instead of Ltwoo

Shimano's upcoming gravel Di2 is meant to be using micro spline hubs (to get 10T), so that might be a better option for those wanting 10T with ERX (use micro spline wheels and cassettes), as the chain spacing should be the same as standard Shimano HG (I believe XDR chains have slightly bigger gaps)

There are people on youtube that are using Shimano cassettes with AXS and the other way round.  So I would have thought ERX would technically work with XDR cassettes, but there have been reports that the shifting isn't quite as good when mixing AXS with Di2 (12 speed). 

IMO the best 2 good cameras for recording bike rides are:
-GoPRO 11
Best stabilisation, I used it on my MTB handlebars, cycling through the local forest and the video is so smooth it looks like I am floating. 
-Insta360 X3
Takes 360 degree video, so you can focus in on different parts of the video when editing.  A bit like switching between different camera angles.  I see a number of commuters using cameras like this as it is great for capturing footage of dodgy drivers. 

However if you get a camera that is supported by Gyroflow (free software), you can get similar stabilisation to the GoPros with a bit of extra work. 
https://docs.gyroflow.xyz/app/getting-started/supported-cameras/runcam

For example the Runcam Thumb Pro-W can generally be had for less than £100.