Looking for some advice on finding a line for the DH 7146-4. Currently I have it set up with a 6/7 Airflo Delta Spey Long at 510gr. It casts great for me but the 7/8 (570 gr) is whats recommended and I want to try the heavier line to see if it throws any better. The problem is that the Delta spey long no longer seems to be available and the other lines I have researched look to be significantly overweight (SA, Carron, Next Cast). Any thoughts? Also, does anyone know of a line company that makes long-bellies spey lines (65-85ft) in the 550 to 650 gr range?