Anyone recall at what generation Transparent cable used metal for its network module?


Just curious does anyone recall at what generation Transparent Cable used metal for the exterior of their network module?  Are the exteriors all made from acrylic after MM?

G1 -> XL ->MM -> MM2 -> G5


rogerhifi
Thanks @no_money for your respond.  I skipped a few generation after the G1 and realized that their more recent generation no longer have the aluminum exterior for networks.
Anecdotal mention...owned many cables including current Gen Transparents.  They lost something special after they went beyond Gen 1 XL TECH....for me the magic went away when the acrylic came to stay!
@dave_b yeah I actually am not sure if acrylic finish improves the performance.  To me the aluminum finish is aesthetic better than plastic.  But again it's just my opinion on the look along, not sonically.