Steel tanks also conduct heat well, useful when you're trying to control the chemical temperature. There are problems with steel tanks, though. First, if you get the kind of tank with a steel cap, the cap may freeze on and become hard to remove. A lot of steel tanks have plastic lids which come off easily. Unfortunately, plastic lids aren't as durable as steel.
Some people have difficulty winding the film onto steel reels.
It takes good coordination. And if you drop a reel, it won't break, but it may get knocked askew, which will make it much harder to load film properly. You need at least one reel to handle each film size you plan to develop. We do not no if there will be a black and white APS film. If there is, it will require a new reel size.