If it were me, I would get a larger dust collector. People seem to over rate dust collector performance.

For example, I do not believe a 1.5 hp Dust collector will deliver 1000 cfm. Wood Magazine tested a number of these and none gave that performance.

I get over 1000 cfm with a 6' but running a 5 hp with 15" impeller.

If your dust collector works well enough for you, then use it.

Too many people use a fan anemometer to measure cfm and there are just not accurate at all. Measuring performance need either special probes or a hot wire anemometer and take measurements across the section. Unfortunately, it is quite difficult to measure performance.