Kart Republic KR2 or 4 Stroke Chassis

Think about getting a Kart Republic KR2 or the 4 stroke chassis version (anyone know the model number for it?)- to run a Briggs WF… we are out in the middle of nowhere and have seen a Kart Republic in Tucson… was wondering for a honest opinion or experience with them… please respond only if you have had one or know someone who does… called a couple of distributors of Kart Republic and of course you can imagine what they said about them… We currently run a Tony Kart 401R with a Briggs WF on it and want to see if I should go that route…