Description: The 4-Twenty makes a good C1 river running playboat conversion. It's width makes it stable and the ends are not too grabby. It is a good playboat, in a hole it throws excellent loops but the M/L can be hard to throw around if you are under 170lbs. Good big person playboat. If you have the kayak outfitting it is easy to do a conversion as seen here, although preserving the kayak outfitting isn't possible with this method.