Wow, Lester, it sounds like you've got your act together and measured everything down to the micron. I admit I was not familiar with the details of your Epiphone, not knowing that it has a one-piece combo bridge/tailpiece. Here is one more thought: the longer the length of string between the bridge and tailpiece, the softer the strings will play because the string behind the bridge will give a little bit. On my own Custom solidbodies I generally place the tailpiece twice as far from the bridge as it is on a Les Paul. This both softens the action and fattens the tone, and it ensures that the strings will not touch the body of the bridge. Since, on a one-piece combo bridge, there is no string length to speak of behind the saddles, there is no "give" like their is on a two-piece setup. So it seems that short of tuning down, the only way to improve the action is use lighter strings. BTW, this is not just some shit that I am making up. The information comes from Jimmy D'Aquisto, who was interviewed by Irving Sloane for his book, Steel String Guitar Construction. Jimmy used this knowledge to customize the action and tone of his archtop jazz guitars after they were built, in order to meet the buyer's preferences. The chapter on archtop construction clearly states that shortening the tailpiece (in effect, lengthening the string between the tailpiece and bridge) will soften the action. I hope this is helpful.