No, the largest Coulter palette box which I bought is 4 lbs, not 5.5 lb.— heavy, but worth the extra palette and shelf space for me.
And the Sienna Compact small panel holder is 1.5 lbs. so combo is 5.5 lbs.
Scroll down page for Coulter palette box specks
Here is Richeson specs Sienna Compact Panel holder. I accidently posted the larger Sienna panel holder above.
The one that is 3 lbs is larger for big canvases. The compact smaller one is very Lightweight at 1.5 lb.
So its 4 lb plus 1.5 lb. it will take canvasses 6”-20 inch” high
The Daytripper combo is less weirght by 1.5 lbs I believe, but the palette is smaller.