The fabricated aluminium ones were a marvellous computer design and real fun to build but were always way too heavy, these look potentially a lot lighter, and maybe not so constrictive to a broader pilot than the little bucket seats. I am not is a rush to retrofit adjustable seats to mine, they seat the pilot higher in the cockpit and at 6'3" I need all the headroom I can have. The headset brushes on the cabin frame sometimes as it is.