It's just amazing what you can accomplish with 3D printing capabilities. Take a look at Vorwaertz and his nifty VRZ 1, I just want one of those!
VRZ 1. is a track bike frame with 3d printed stainless steel lugs glued together with carbon fiber tubes.
this method allows to build custom frames in a short period of time.
you could change the geometry to what ever you like, then the lugs gets generated by a software.
now we just need to print the parts finish them and glue the frame together.
The fork is 480 g and the frame weight is 1100 g (for stainless-Carbon Frame)! if we print the lugs in titanium, it will get even lighter.
The printed lugs could also be used with steel or titan tubes!