Looks good
. The small stone in front of the large one on the right will vanish in your carpet; its useless. A good chance of the one on the right getting buried exists, but I think it balances the concave side nicely enough at present. Too bad you don't have one more about the size of the left stone to use on the right. Iwagumi like you are making should be three stones altogether or odd numbered groupings. I realize you have 1 and 3 respectively, but in such a small tank it doesn't read as natural when it blurs as 4 in close proximity.
The soil depth is good. It helps buff up your stones to appear more befitting of the space
Just my $.02
Aside from those technicalities, great job!
Beautiful stones I might add... This should be a spectacular tank.
I'd agree with the offsetting if they are in a true line when viewed from the top. That should not occur. Can't tell from the pictures.