Interesting....I received a promotional email from Alientech about their new MA2 range boosters. I just like to share how the MA2 remote can be modified. Previously I did modified my MA remote with Alientech and obtained very satisfactory result flying in urban area.

Hi. Thank you for sharing this post and your informative insights regarding this matter. Just a friendly reminder, DJI does not recommend doing any modification on the DJI Mavic Air 2 remote controller, this may work but we cannot guarantee the stability and comparability of the said modification and this can void the warranty of the said drone. Thank you.

Thanks for sharing

Looks nice.

any other reviews of this?  I live in the city and constantly get weak signals.

There are some YT videos of their products with other DJI drones which show the results.  I think most people have said it does not make a large difference, others will disagree, depends on the  use scenario perhaps.