Kenny, thank you for sharing this with everyone and thanks for mentioning Discount Hydraulic Hose as well!
Your tutorial was very thorough and accurate. To confirm what someone else said, the fittings are re-usable, but you should always cut an inch or two off your hose before using them again on the same piece of hose.
As others have noted, reusable (or field-attachable) fittings aren't cheap, but they certainly do fill a need. We have lots of customers, especially truckers who are usually miles and miles away from home when a hose blows, who keep a few of these fittings in their toolbox for emergency repairs.
Thanks again, Kenny. I really enjoyed reading this, and I may even point people here to this thread the next time I get questions on installing these fittings.