Well I don't know if I'm the best (I have yet to meet a woman who thinks so) - but I sure am different!
Strogey, the thing I've noticed with cars that come with the tiny simulated chains on them, is that they are somewhat fragile. In my mind, these cars with chains are meant for the loads that came with the cars and not for any kind of frequent changing of loads.
So instead, I use two other things: black or brown girls hair braids or very small black rubber bands sold in bags for use in little girls hair. The rubber bands seem to come in bags of 100-300, though I've found bags of 500 for just $1.00. They don't last forever when wrapped around a load, but they're cheap and easy to replace around the flat car load. PLUS the rubber bands make for a super looking load in a gondola.
The woven elastic hair braids are a little more expensive, but a little more durable though they do stretch out over time. There are two kinds: one with no joiner and another that has a metal joiner where the two ends of the braid connect. With these, you have the advantage of cutting the braid at one end of the joiner, slipping that through any holes already in the flatcar surface, and then making a knot at the other end. In other words, the braid isn't wrapped around the whole flat car, but through the mounting load holes.
Nope, these are not like the simulated miniature chains, but they're cheaper, more durable and easily found and replaced... more than enough incentive for me. And really, they don't look bad at all. I view the ability to easily and frrequnetly change loads on a flat car as better side of the trade-off.