wrote the reply and looks like not posted...
I bought 125L one from amazon. has no holes on top, but I will put 4 longer bolts through in order be able to put the grill on top, like in this pic 3.
I will be able to smoke meats in 3 layers then I think: hanging below grill (with S hooks), on the grill itself and with additional raiser on top of the grill
only question is - wont all bottom holes and open top chimney will make the the generator to be used too quickly? maybe it's worth to cover few holes in the bottom and to have some sort of "gasket/cover" on top chimney as well?
In Kamado I have bottom and top vents at absolute minimum gaps and smoke maize lasts me about 12 hrs. and I usually smoke meats for like 24-48 hrs