That was the long way around of saying that I tend to use terribly crude debugging techniques with unsafe printfs.

In principle, you could create a chart that describes the final tensions arrived at by using different combinations of tension and pull time.

From the besieged Ardea all in post, Borne by the trustless wings of false desire, Lust-breathed Tarquin leaves the Roman host, And to Collatium bears the lightless fire Which, in pale embers hid, lurks to aspire And girdle with embracing flames the waist Of Collatine’s fair love, Lucrece the chaste.

Have patience, and in the end we'll pay you all. Your worships are most heartily welcome. I made bold to send for you, and you may see to what end, which was to discover unto you the wild vagaries of this wanton wag-pasty—a wild oats I warrant him—and, Sir Harry, that your daughter hath scaped this scouring, thank this gentleman, and then make of him as he deserves.