so i'm very interested in building a bass cab...two to be precise. i don't recall seeing a list of names who do this regularly. if anyone has suggestions feel free to ask. the cabs i want to build are clones of the jcm 800 bass series the 1520(4x12) and the 1552(2x15). before i get flack for "whats the reason behind matching the 4x12 and the 2x15?" put it simply, i don't like 10's and 12 have a better mid sound to me. so 4x12 instead of 4x10s is just my taste. also 2x15 to give it a little more bottom end. i got the dimensions from a member on the marshall forums but outside of that where do i start? the sidewinder speakers are no longer in production, so i would have to find speakers. the music i play with my band is similar to this: i'll be playing very heavily distorted, so is tuning the cab important if i'm playing this way? i've got the WinISD downloaded, but i honestly can't make heads or tails of it. any help would be greatly appreciated.