I tried poly/sgut hybrids before. In those hybrids, using shaped or textured poly's made sense. The mains provide the bulk of the performance. The crosses support the mains. With poly in the mains, you get more of the poly characteristics, but remember you are being supported by the crosses.
CT for me played great for about 2-3hrs. Then it would lose too much tension and the sgut power started coming through at lower tensions. The setup was unpredictable and I just couldn't rely on it.
I like how V plays in general. But it was a little too muted, low on power and not enough spin for me. It has great control, and holds tension well after its initial tension loss. I chose a cross that could help enhance those areas I felt deficient. Cream is a softer poly with more power, feel, spin potential but also holds its tension well.
I take my 1/2 set of string, wrap it around my staircase post, hold the ends with my starting clamp. Then I lean back while holding the starting clamp. I'll do this 5x for 10sec duration. It's rather unscientific. I know
@Shroud and
@esgee48 measure the elongation of the string. But I think I've got things dialed in for my purpose. I lower my reference tension about 2-3# to compensate for taking out the initial tension loss.