The study that Proctor is doing is still on going but the results after the first 3 years shows that there is less of a drop off in sap volume with something new in the tap hole. The study is being done with all systems on vacuum so it doesn't help the gravity guys as much.

After the third year the woods with new taps or adapters were within 85% production of the new tubing. The tubing that was only washed was hovering around 75% It is too soon for a report for this season and the study will go on for at least another season.

I can't wait until next season to see how my woods will perform with all new drops in the old section and new adapters through out. I feel that I left alot of sap in the woods this year because of the 5 year old drops and taps in the old section.