The fitment of the airbag is the function of the steering wheel itself.Duneomatic sells the right adapter for Elise steering wheel - it's your choice using other adaptor that its not meant for the steering wheel you bought -- after all, there are safety to consider......say the fitment of the air bag?
You might as well buy the raid.
The hub is the interface between the steering wheel and the splines of the steering stalk. It resembles a disc. Both the Raid and Elise hub adapter have the same mating splines on the stalk side or the center mounting hole. The difference is the actual diameter of the hub itself and tapped bolt holes that the wheel attaches to the hub. It is my understanding the hub diameters are different sizes. It does not mean it is impossible to interchange them. Just that it involves more investigation.
With that being said. It is possible to drill and tap new holes in any adapter to mate up with any wheel if you know what you are doing.
One must remember that both the Raid and Elise hub kits are made for fast and easy installation by even a novice wrencher. I would think if you have the ability to modify a hub you would have modded one of the off the shelf hubs sold by many auto outlets.
I forgot that instead of drilling/tapping new holes in the hub it may be possible to drill new holes on the steering wheel side to mate up with the existing tapped holes of a hub if you can do so without negative impact to the integrity of the steering wheel