I wasn't familiar with 7005 so I looked it up and found that it is used almost solely on bike frames and it only has slightly higher properties than 6061. I was unaware that any alloys in the 7000 series were weldable by standard means.

EA60-T6 however doesn't follow standard naming convention so I suspect it is just a standard alloy with some marketing thrown in. My guess would be something in the 6000 series of aluminum. Is it welded at the seams?