At this point in time, one-wheel-peel karts are the 'exotic' kart I don't have.
Quirky, odd-handling or squirrely, capable of burnouts, tighter turns--like having a differential. Keep 'em as-is and run 'em as cheaply (non altered) as possible.
Still Manco brand ("oooh, rare, collectible!") even though they were most likely the least expensive model in the lineup.