That's perfect. A seat shouldn't be too hard unless it only accepts certain seats? Do these seats only work on these rigs and as office chairs or do they use the same design as what goes into a car? I would assume the design would be interchangeable.
You can make just about anything work. I have my Racetech seat that I took out of my Viper as mine. You can use an old road car seat as long as you mount the bracket. The aluminum frame sim rigs are awesome because everything is customizable and versatile.