Does anyone know if impellers are all the same for a blower unit for a dual bagger? Not even 10 minutes into a job I ran over a 2" bolt and nut combo. Our BRAND NEW bagger sucked it up and you guessed it, ruined the impeller unit. It took some small chunks out (nothing major) but it looks like it bent 2 of the impeller blades. Now this Gravely set up is 1/4 or 3/8 thick steel blades, I know the rpm's are moving but I wouldnt think they would bend up like that. But it took Gravely 2 weeks to get me this bagger and I cant wait another 2 weeks for a part, thats why I wondered if the impellers are basically the same. Thanks in advance.