Reply to "Suspension Lift Kit"

Am I thinking about this right? Are those pictures in the vendor link above showing an air ride bag that fits over the shock chrome sleeve in the center of the shock, the shock's shaft? Anybody who has had an RV and looked at their air bag suspension may know the answer. Is that an airbag that goes under the coilover spring and over the shock shaft? If it is, then all that's required is disassemble the shock, which means I have to buy a coil over shock spring remover, if I do it myself, then take the top of the shock off, insert the air bag and reassemble. Then add the flexible air hoses to the compressor in the kit, and spec out the right kit for the features I described above. No welding or braces or fittings to install, no added stress points to figure out where to affix to the chassis to mount an external air lift bag to. Run a few hoses, a wire or two, and a switch or button and I get what I want. We get what we want. If we stick together on this.... Anybody else want to help out here? Share some info?