I just think that with what he described, 42/38 might have been too low. Full poly in the low 40s is ideal. With gut in the mains, I would bump that up a little.
You have a full set. Try it where you normally string your other setup and if that seems tight, try it down 3-4 lbs.
I string full O-Power at 44, but when I play it in crosses with gut mains I string it at 54/50. 52/48 is too soft. 54/50 is just right. But full bed O-Power that high I hate.