If he has the ARC / Cremona floats that Thunder Tiger sells for the Cessna and he uses the mounts as they are on the floats there won't be any problem. They were designed to be togeather and they work fine that way. I agree that the CG should be verified that it is real close to the plane CG . All the ARC floats that I have used on the ARC / Thunder Tiger planes work fine, in fact I have floated all the ARC planes that use floats. Ready, Beaver and Cessna sometimes more then once. ENJOY !!! RED