For easy setup of the rig when traveling for work or whatsoever, I wanted a compact antenna, full of compromise but with descent performance and also good price.

I think the ATX Walkabout antenna is a good call. It's also known as the MFJ1899T.

For now, I've not tested it, so I just put the small instructions here : mfj-1899t.pdf

Also, from W8ABZ https://www.qsl.net/sv1uy/counterpoisekit.html, I've created a counterpoise kit with the informations below :

Edit of 28/12/2019 : tested on field with my FT-818ND. I've added couterpoise for 40m. I went on the top a hill nearby the home (120m from sea level). I was a bit surprised I received really lot of things, from CW to SSB without problems.

I tried some contacts, I was heard by a German but too weak to make some reports. After that, I was heard by MM5DWW in Scotland. My signal was weak but he was able to QSL my QRZ after several times. Unfortunately a big gun arrived on the frequency after that and I lost him.

Let's see after that for new contacts !

I've modified a camera tripod and here is the result :