well I have been thinking and have thought of a new design ,I know you guys are going to think im nuts but I think i am going to go this way ! im still going to have the 125 on top and the 72 on the bottom I am going to double up on the two by fours in the back so the whole back of the new stand is supported well,
and in the front of the stand I am going to move the support braces in and have them on both sides of the 72 doubled up, I want about 24 inches of open shelf on both sides of the 72 for display purposes , here is another hand drawn diagram that I scanned I beleive if I run the 3 doubled up 2 x4`s supports from the front of the 72 to the back of the 72 there should be enough support to hold the 125 , use your imagination and you should be able to see what I mean !
and in the front of the stand I am going to move the support braces in and have them on both sides of the 72 doubled up, I want about 24 inches of open shelf on both sides of the 72 for display purposes , here is another hand drawn diagram that I scanned I beleive if I run the 3 doubled up 2 x4`s supports from the front of the 72 to the back of the 72 there should be enough support to hold the 125 , use your imagination and you should be able to see what I mean !