when i ride my rollers it feels like I am giong to shoot over the front drum,Do I need to adjust the wheelbase setting.It seems impossible to get totaly comforatable.I have had them for almost a month and would like to incorporate harder workouts to my ridng on them.

Where is your front axle in relationship to the front roller?

My front axle is just behind center of the front roller and I don't have any problems with mine, but I am also not out of the seat pushing hard. I am keeping in the seat and pushing my cadence around 110 at 25 mph or a little more, as I really don't try to focus on the cyclometer. Usually I am riding on the rollers around 20 mph and keeping my cadence around 90.

If your rollers are positioned properly for your wheelbase (see above), maybe your weight is too far forward?

Otherwise maybe you're looking at the ground instead of out ahead? Or you just need some more practice to get comfortable?

As said above, the front axle should be just behind the middle of the front roller. It might feel like you're going to go over the front, but remember your back tire is wedged between the two back rollers pretty good, so it might just be an issue of not worrying about it too much.

Did you check the axle location?