I had had a watson 100 loader for years, laying around.. I just got around to doing b&w at home in February.. Presently I have 4 loaders sitting at home (esniped the others on
ebay for ~3.00 each) and have Arista T200, Tri-X, Plus-X, Panf+ (Arista 50), and TMY in them.
Much easier than playing musical film roll with only one loader....
I'm not sure how much I save, but it's a lot more convenient. I was paying something horrendous like 6.00/roll for Delta 400 36exp for photo class. 6 * 18 = $108.00 versus about $35.00/100' roll...
So a savings of ~2/3 I suppose.
The Arista 50, expired, is 12 bucks for 100'
Arista T200 is 20 for 'fresh'
Can't beat that deal with a stick.