I have completed all the PDFs for Champion's Odyssey. I have also posted a single-bordered card template that you can use to print on the backs of sheets HR04, HR05, HR09, HR10, HR11, and HR12. I am developing a double-bordered card template for HR01, HR02, HR06, HR07, and HR08. I am also working on a special backing template for HR03, which needs to have a combination of rubble for Strongholds, single borders for upgrades/downgrades, and Guardians (which are the same image on both sides of the card.
Also, if you've been downloading these PDFs, you will want to re-acquire HR05 and HR08, which were changed because not only did I forget to include a couple of cards, I also forgot that creature magic items are single bordered on the back, while hand magic items and accessories are double-bordered, so I didn't want them on the same page.
I have deleted and reloaded the single border and double border templates. I realized they were orientated backwards. Now you should print your card, flip the paper horizontally, and print the border template, which should result in the correct orientation. You may have to experiment based on the way your printer loads pages...
The custom backing page for HR03 which contains single borders, rubble, and the Guardian is now up.