Brian if your future plan is to have 2000 taps it would be well worth the investment to purchase a double releaser. New or used. They are very reliable and operate on higher than 15-18" vac. You won't regret it. That being said, yes 250*300 taps is probably the max, yet I had 800 on the larger Bender and 400 on the small jar. If you max them out you tend to have sap backing up unless you create a manifold ahead of your Bender. There are some previous posts and pics in March 2012 here on the Trader.
Bob- 4 x 12 Small Bros. Lightning w/raised flues-open pans
20 x 40 sugarhouse, all tubing-main line to sugarhouse
1400+- for 2011 & 100% vacuum
Polaris 500 HO w/Tatou 4s Tracks
1 Chocolate Lab from TEXAS