Ian,
That's a great story about the seat.
My blasting cabinet is called the Skatblaster, and I got it from TP Tools. It has a Soda Dedicated take off on the side, and a regular hopper inside the unit itself. I cannot even begin to sing this units praises enough. The soda works wonders, and I use Arm & Hammer Baking Soda in the 25 lb bags from Sam's Club. I have also used fine glass bead in the internal hopper, and that works great as well, especially on rusty, nasty parts. I did learn an important lesson about not being lazy, and no leaving your glass bead supply in the internal hopper while using the soda. The spent soda, accumulates quickly, and its impossible to separate from the glass bead. The mixing does not really matter as the glass bead is much coarser than the soda, its just that your visibility gets bad as the waste accumulates in the internal hopper, and it takes longer for everything to settle down. So, if you are using a system like this, empty the spent soda before using the glass bead. When you are done with the glass bead, empty the hopper and store it away for the next use in a closed container for its protection.
My compressor is a HC 80 Gallon, 2-stage that I got from Lowe's, but it is sold under Lowe's own brand. I cannot remember the name (not Kobalt, though). Home Depot has the same exact unit marketed under Husky. Its a very good compressor, and so far I have yet to have any issues with. I just make sure to keep the oil clean. Eventually, I will install a better pipe system for the air, as right now it's just a 50' line coming off the compressor/regulator/water trap. Occasionally, it will blow some condensation through, but as of right now, not too much.
Michael