That is pretty much what I did. My existing return lines were so old they immediately snapped when I touched them, so I had a lot of fun picking old bits of hose off the metal nipples on the injectors. The very last bit of hose closest to the firewall had a metal plug in it that I very carefully cut out of the old hose it was in and put in the replacement hose.

For the cost of the return line hose and the amount of annoyance the old ones cost me when they disintegrated I should make this an every couple of years or perhaps even an annual maintenance thing.