Wondering what make this engine is....it looks pretty light. I saw it today at Lowes, but the trimmer isnt on troy-bilts site, and I wasnt able to find it anywhere online yet. I think the model was tb2000, and it said on the box the 22.5cc "pro" engine developes as much HP as the 31cc trimmers. Only thing lowes shows on thier site is the 31cc units. It was 99 bucks