Another take on the subject. If using 1/32 scale aircraft and 1/35 & 1/32 scale figures, place the figures at a bit of a distance away to minumize the scale differance. Same with vehicals. The problem comes when the figures need to be within the plane or vehical. People working on or under a plane will be seen as figures working and the size differance will not be that noticable. As people come in a variety of sizes, it works out fine. As far as plane dio's go, they are rarer to find as the choice of dio is limited, such as on the ground (tarmac, cement, grass field, p.s.p. or carrier deck), in flyable shape or repair, preped for take off or recovery from battle damage ( on the ground or water), or even crated up for shipment or in delivery mode. Flying is harder to portray without the use of clear rods and such. I know that many build for a collection and the base doe's not matter. Some just can't be bothered with the extra work and are happy with the plane on a shelf. So depending on YOUR choice of display, is what you'll end up with. I have several 1/32 planes and 1/35 helo's, and they will end up on dio's because that's what I like. Interacting as they should as far as I am concerned. The base for a dio is what holds the story together. It ties in the supporting actors, people or vehicals, to the story star, the plane. There was a dio here a month or so ago showing a Japponese bomber under repair on a dirt strip with the surrounding jungle growth and the maintanance crew going about what they do and the supporting vehicals to help them. By itself, the plane would be a winner, but with the figures, vehicals and with the groundwork, it is exceptional. Another problem with large scale aircraft is the size of the base needed to put together a story. Covering it with a plastic case can be expensive and cabnets can be beyond the reach of most modelers and then again, the space to put them. I want to buy that large B17 and B25, but where to put them and the base have made the desision for me, unfortunatly no can do. So, with all that in mind (and I love dio's) I end up building mostly vignetts, because of space limits. Heck, I don't know yet where the R/R dio I am building is going to end up. The comander in chief say's not in her living room or she will call in an air strike. So if you like planes, what are you going to do. Build a 12 inch by 12 inch dio for one or two planes in 1/72 or 1/48, or have space for five planes. You have to make a choice one way or the other. In the end, I think it comes down to how much space you have to work with. Nothing worse for me than to build a nice dio and have to keep it in a cabnit or plastic container unseen by anyone.