A person's success with the solid also depends on their style, i.e. stroker, tweener, cranker. The way I have my T-road Solid prepared is oob at 1000, and use it on most heavier oil conditions, and have met great success playing deep inside which for me is between 4-5 arrows. It can also go straight on heavier conditions, between 1-10 usually works depending on the house, speed, revs, etc.
Anyway, that's just my two cents. Unfortunately I don't get to use it on heavy oil much, because my league house isn't heavy enough for it with my style. Anyway, hope this helps!
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In the Bag:
Storm T-Road Solid
Roto Grip Saturn
Brunswick T-Zone (Spares)
Season High Game:
222
Season High Series:
512
My House:
The Orleans, Las Vegas