I'm trying to play the arpeggios for Maggot Brain, just simple barre chords Eb, D, Bb, C. After a few minutes my hand gets tired and I need to stop. I've been doing this several times a day for 3 days now, and I fear it isn't going to get any better. I've tried following the common advice here: slow, use as little pressure as necessary. A big part of the problem seems to be the Bb chord, I have to grip my index finger hard to get the minor third to sound. The other chords I can put pressure on just the 4 strings that I need to play. I am playing seated, using a telecaster with 10s. Any suggestions?