So all of them are now tested and used for about a year or more. Just thought of sharing about what do I carry now with me.
Thumb box: three mdf panels; a lot of brushes, as it is not possible to clean them all the time. Five/six used tubes of titanium white, cad lemon, cad orange, yellow ochre, crimson, cobalt blue; small palette knife; tissue paper box and baby wipes in the car. Small nylon and used bristle brushes.
Pochade box: two 8x10 thin mdf panels. White, cad lemon, cad orange, yellow ochre, alizarin crimson and cobalt blue. An old squeeze medicine bottle for linseed turps mixture although never used it. Small nylon watercolor and used bristle brushes. antenna Mahl stick, tissue, clips and a strap to attach the box around waist. Palette knives. I am actually carrying a lot less. Tissue box, baby wipes and tripod stool in the car; used on need basis.
A Mabef alternative easel: this is for bigger canvases, e.g. 12X16 and above. The above palette box is needed for supplies. Palette ans canvas were attached easily. Brushholder, cleaning rag, turp can and painting knives are attached as shown. Wide legs can withstand a lot of wind pressure. I don't use much medium. If I need thin paints then I can use some turps from the can. Oil can be used separately.
Watercolor: much more flexible setup. Unique thing is that the box carries both opaque and transparent colors. Sketchbook, double headed brushes, water dippers, waterbrush; pencil, eraser, tissue etc. are also there. All of these can be used on need basis.