Hi Bob, I had a 4.8 Gladiator. It was a good boat to learn on but wasnt that strong. I had a hard ride due to its relativly shallow v hull. I managed to burst 2 tubes at the same time and bearing in mind the 4.8 only had 3 inflatable chambers it became very intresting to moor once I was off the plane, ie it started to sink very quickly. Finally the boat met its demise on the Thames after hitting a large branch at about 30knts which cracked the rear of the hull where it joined the transom.
In summary, good fun, cheap to buy but would not buy the same again.
ps tubes where pvc not hyperlon