Wise move, sir! wise move.
I really like saving money and DIY is often good for that but the DIY canister is still not working for most. When they eventually get them put together to not leak, they are such a pain to deal with taking apart that most just go buy something that works.
If I had to get tools and a helper to take a canister apart my wife would kill me.
There is currently a blurb about a fellow on U-tube who shows how to build one using PVC pipe but he is missing lots of the obvious problems.