aaronhoy,
The forestay will go slack anyway once the jib is up so why worry about it being tight. I have seen a rig where there was a second adjuster on the bridle that the forestay fastened to. There was a short bungee cord that pulled the upper adjuster at a right angle after the jib was up. The pupose was to tension the otherwise slack forestay so it didn't rub on the jib. I also don't tie the line to the adjuster, I tie it to the shackle below it.
Howard