Antwack
Senior Retro Guru
Nice looking project. I like it.
The frame seems to be a "pulse comp" Trek era frame. The pre Trek pulses (and the Pulse IIs ) had internal cable routing.
About the "missing" canti hanger, you can buy seat clamps with integrated stops. Or use one of those stops that are attached to/by the seat clamp.
Google: cantilever hanger seat clamp
Thanks mate... do you know what year this frame is?
The thread title originally stated Pulse II but I realised I'd made a mistake so changed it to Pulse.
I've been looking for one of those seat clamps with the built in hanger but not found one yet in 36.4mm.