I work at a precision machining company and am having issues with making a model, which i attached. There are several graphical errors on the part, and overall it just doesn't look very good. I included my model and the print i made it from. If you have any suggestions (or could just fix it for me) that would be great. Thanks!

Also, the tabs don't blend with the outer ring. I've tried using a variable fillet but i just can't get it to work.