high end playing in second position

Hello Paolo. Yes, "Blues For Paul DeLay" in Tongue Block Study 5 does. Songs that also include high-end playing are "Take It Easy Now" in Tongue Block Study 2.5 and "Walk with Me" Tongue Block Study 1. As you already know, both 1st Position and 3rd Position studies have TONS of high-end playing as well... work on those too, it all helps. The Improvising Studies also spend time on the high-end, from Studies 8 and up.