Why don't you consider getting another Clack? I've owned 10 driftboats in my life and Clack is by far the easiest rowing. Glass is warmer than alum., but not as tough. This year I tried out an 18 foot Clackamax and found it was easier to row than my 17 alum. boat (that I still have), so I bought one. The 18 foot Clack is REALLY big and comfortable and with the new innovations on the bottoms of Clackacrafts you'll find that the big boat rows easier than a lot of 16 alum. boats. But, Clacks are expensive.