Well I finally finished my WE 757A's. Its been over a year in the making and a few bucks but I did it. The sound is Absolutely Glorious. Those WE engineers are GOOD! I have built the cabinets based on the original dimensions and got the front baffle as close to the original material as possible. I was fortunate enough to have seen a real 757 in person to study the front baffle material. For the drivers I used a 802 for the HF and a WE 728b for the LF. As for the horn I am using a 3D printed KS12027. A few years ago I tracked down a Original KS12027 and sent it off to a Commercial 3D printing company this spring to be replicated. A lot of time and money went into it but in the end I have a exact replica of the horn. In a blind test you cannot hear the difference between the two.