Hi there,
I have a question I'd like to ask. But a small story before that:
During my schooldays I learned a nice trick from my father and showed it to my friends. I don't know if the trick has a name, but it's very simple so I describe it here. I hope this is not exposure. (Well, I'm quite selfcontradicting, in my introduction I just said I learned that exposure is NAY and now I do it again

If this too much exposure here, can a mod kindly remove that part?)
In this trick you take some court cards (8 in my case) and lay them down in rows. As you face away from the table you tell a spectator to turn a card 180 degrees (NOT upside down, this would be too easy

They asked me for minutes how I did this and I finally gave in and told them that I just looked at the border of the cards. For this trick I chose only cards with one border slightly narrower than the opposite one, so for the next turn I just had to remember which cards were already turned.
After this they were really disappointed that it was that easy. So it was also me who was disappointed, as I took away the amazement and neither me nor them wanted to do another trick (but I did not know a second good one at this time anyway).
I did this trick with quite cheap german cards (32 cards deck). To train the sleights from RRTCM I bought two bicycle decks and tought that these should offer better quality than my old ones. I was quite surprised to see that both bicycle decks contained cards that are really bad cut. The borders differ in width between two and five Millimeters. I'm sure even an untrained eye would discover this easily when I'm trying a DL or such.
Is this normal for the bicycle decks or even for all manufacturers?
What cards would you recommend for training?
Maybe I should use cards without any border?
Thanks and bye,
MarkyMarc