I used to cringe when i saw pilots pulling down on the ropes making sure they were nice and tight...........
Is that because you are worried about rope shrinkage? Most modern nylon ropes -especially kernmantle style (climbing or yachting) ropes- have relatively insignificant shrinkage.
It's the older hawser style cotton ropes that swell when wet that shrink, possible straining the wings (equivalent to neg g's) if ties really tight when dry.