Ive turned oak and osage orange, green, on my 1642, inboard with about 1/4 of an inch clearance.. blanks weighed at least 60 pounds.. no problem. Ive got 400 pounds of sand on the leg bench. Make sure your work is as round/balanced as you can get it, use a big face plate with alot of screws.. go slow when you start out.. support the piece with the tailstock when possible. And most of all stay of of the line of fire!
Generally, Ive found that there is an inverse relationship between size of the bowl/blank and fun.. the bigger they are the less fun the turning.
Have fun
South Charleston
Ohio, USA