Step salsa down in size.

[Brion Toss]

Hi again,
Sounds like the Rigger's Curse: Large rope and small blocks to you. 30mm blocks are typically used for a maximum line diameter of 5/16" (8mm), so your Salsa was fat, even before the insertion of the Spectra. One option is bigger blocks, but you might consider a different configuration, like hanging your blocks on a long pendant, anchored at the gooseneck. With this you might be able to proportion your tackle so that the Salsa never enters the blocks. You'd have the same overall elasticity.
Fair leads,
Brion