Originally Posted by Ramon
It's not just about being anal. If a synthetic string moves it's a good indication that it's losing a lot of tension and is not a great string for that reason. If a poly is moving, it's a sure sign that it's dead or dying, so if it's moving after 2 hours, it doesn't have good playability duration.
I also notice that strings that don't move give better spin. On top that, since the stringbed stays more consistent during the rally, that means a more consistent response.
This is not true. Synthetics move because they do not have sufficient elasticity to overcome the inter-string friction. Speaking of which, natural gut also does not stay grid straight as can be seen by many 90s pros picking at their stringbeds. Poly moving, however, tends to be a sign of death. That I agree with.