I am not sure which tools you have but the constant theme of the air comp being underpowered is correct. An improved tool is not going to make night and day difference and some of the rotary tools are hard to beat.
2 solutions, more than double the air or find ways to work with other means, I have all the stuff dont mean I want to use it if a sawzall will work? Use a 30$ Walmart B&D 7750 grinder and cut wheel where practical, use air sparingly where needed.
For the diy or small biz there is a lot of stuff out there but the 3 pictured are the basics and bargains. That 4 inch is rugged and got lots of power, run wire wheel or disks, the pencil same game, wheels, rotary file, pencil brush etc and the 7 inch for sanding, I have a 5 inch but prefer 7.
Not everyone would benifit from every piece I own but those would get some use. They are actually a generic tool sold under several brands in this price range, I think the farm hand is the same? That pencil is really rugged too. I should have another one but figured to put the screws to this one to see how long it lasted, still going.
I have 3 or 4 of the right angle, one time I put a guy one one for 2 months cleaning a machine, not so much as a screw ever came loose on one.
I would tailor my needs from there, a hammer is good, I use a scaler a bit.
