Thanks Ashhar for this post. I shall now use this?in my QRP station (Hermes Lite 2 with Alexloop magnetic loop antenna, which shows SWR values largely over 40:1 to the tranceiver when tuning the loop (fortunately the LDMOS power amplifier can accept SWR>65:1 but I prefer to be cautious. This tuning-indicator brings the SWR seen by the tranceiver below 2:1 when tuning the antenna, as you say in your post.
I continue to watch the development of your sBitx, wich looks like a wonder and shall decide later to buy one.
73 - Pierre - FK8IH