Still working on the Shadow basket case and just noticed that the rear head intake port opening is about 31.5mm and the front head is 29mm (standard). The rear head looks very neat inside the intake port and whoever ported it obviously knew what he was doing. However, can I expect troubles from the different opening dimensions and should the front be opened out to the same size as the rear? Any thoughts or comments would be appreciated greatly. Since I don't port and fixing thiswill requires shipping it to others, I'd rather leave it as is if it is not that important. Thanks, Charles Cannon.