Instead, I went to Staples and bought a ream of A4 160 gsm card which I know is beautifully FP friendly. Then I fired up MS Publisher and designed some templates to create index cards with cutting guides. Each A4 sheet will yield 3 cards, using a ruler, cutting mat and sharp knife.
Below you can see the two designs I created and printed.


Anyone with MS Publisher who'd like a copy of the templates, just PM or email me and I'll be glad to share.
Ray