Todd
Once I could do it with a basketball I downsized to a mini basketball.
Now I can do them with consistency with a 3.5" ball.
I would also recommend starting to learn control points.
Without watching you I have no ability to make 'helpful' suggestions.
I put helpful in quotes because me telling you what will help and what
really helps are two entirely different things.
Also Michael Glenn has pointed out to me to MOVE when doing body rolls.
If you spin in the same direction you are rolling the ball the ball
will slooooowww down allowing you more control.
Also this is a good way to start moving.
Oh and MOVE AROUND as much as you can given your space limitations.
Keeping the 50" plasma safe is more important to most people then you
getting your best body roll ever. BE AWARE of your surroundings and
always 'Respect The Ball'
Let me know if this makes sense, if it helps, if you have more
questions because of it.
Rich Shumaker