Yeah Proxeys are pretty good and well priced as well. A539 Yok are similar as to the Proxey but a tad more expensive. If your on a budget and want the best of both then something like the Proxey will be fine, if you want the best from her then stick with 888 but obviously cost more.
Most Starlets handle like shit as they have saggy old rubber bushes that have done ridiculous mileage!
Most will add braces, lower arm bars, adjustable rods but it's the bushes that hold it all together so do these before the nice looking parts!
Granted the rear axle setup isn't the best but I guarantee it with balls of steel and clever insight you can get your Starlet up with the best of them rest assured. Being a FWD go kart we will always have more confidence than the RWD and 4WD boys so you can do a lot of upsets. Roll cages make a huge difference as the Starlet floor plan is really thin, it's a shopping trolley not a racer! Even a simple 6 point bolt in will transform the car over night just watch those bushes!!!!!!!
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