Ive used the caswell plating 5 gallon bucket systems. What a pain and nightmare to use, while it worked I had 6 or so 5 gallon buckets with power supplies and heating elements in them.
It was a real nightmare and almost a all day affair to anodize something. As you had to heat certain buckets before you started, then transfer the heating elements to another bucket to start the next part etc etc.
I now go to a commercial plater. I used to use a plater in Charlotte, NC , and I mailed the parts to him.
Try googling the Charlotte, NC guy and give him a call. They were a nice very small company that did not mind a small job. I forget there minimum but it was not bad from what I remember and they did good work.
I currently use a plating shop I can drive to in Greensboro, NC. His minimum is $75 alittle more than my Charlotte guy but the fact that I can drive makes it worth it as I know take a full truck load of parts to be anodized these days.
CW