Well, it will be hard for a novice at home to get all the parts separately, at a good price. You might as well just buy a kit from the appropriate hobbyist source. I'm thinking, while glass is what I'd like to use for chemistry, you might find a stainless steel rig cheaper, to start with. Also, you seem to have forgotten the extractor part, a straight tube you will pack with organic material, that the steal will extract your active from. This extractor tube will have some sort of stainless steel mesh bucket or tray to hold your material, or will be a glass container But that gets even more pricy.