Sand-blasting cabinets?

Thanks for all the help guys. I am going to try to mess with it a little this afternoon. It is barely 20 out & the garage takes a while to heat up. I have had good luck at HF with returning things but they are not very close. I will see what happens with no tip & the other supplied tips later. I like to call it my "just the tip" game! I had to say it. lol

Well it has been a couple weeks but I have the cabinet working great now. The gun came with 4 different sized tips. The smallest one was already on the gun & did not work. I took it off & started trying the others & they all work so the smallest one is either bad or my compressor could not work it. I do have a couple of questions since I am new to blasting. I am doing the UCAs & LCAs for a disc brake swap. Is it ok to do the disc brake spindles? I was planning on taping off the smooth machined area that the rotor mounts on but wanted to blast the rest. I have 70 grit aluminum oxide media & Black Diamond 40/60 grit. Also I want to clean up the dust shields but they are what appears to be aluminum, is glass bead or walnut shells better for that? Also, what/when do I use the different sized tips? Thanks for all the help.