I have a 301B 90 degree Ingersoll Rand I bought in the 80's when I used it daily for grinding corrosion on the big jets. I use it all the time, and it is very reliable, controllable and lightweight. If you get used to using the 90 degree type, you will never even pull a straight die grinder out again. I couldnt live without it, and working with Scotchbrite pads and sanders, you wont need another finishing tool in your bag. I often wrap a small cloth around it when working for two reasons..it will get cold, and the cloth will disperse exhaust and any oil ( don't over oil them) .