So if one was going to buy two tangents, and he wanted the most over stable and the most under stable, he would buy which plastic/weight combos?
Comparing them all when new, my Tangents have all been extremely similar in stability--neither understable nor overstable. Neutron seems to break in flightwise a bit faster than Proton, so the logical way to get two Tangents a step apart in stability would be to buy a lighter N and beat it in and a heavy P to retain it's initial stability.