Binding on the stirrup

I understand how ti tie on and finish the bridle for the prod but how do I tie on the stirrup?
Is it tied on with the same hemp cord as the prod or is the prod binding best finished and then the stirrup tied on with a new binding?

For binding on stirrup and prod, you should take a look at this video.  It's probably the most authentic way to do it ( https://www.youtube.com/watch?v=V2VDpAauAZI  )  Though I don't think the guy in the video is pulling hard enough.  Still, that's not quite the way I do it. In the old days, I used two pieces of cord.  The first tied in the prod and the second tied on the stirrup.  For the prod, I went thru the bridle-passage and over the block, just as shown in the video.  For the stirrup, I used a second piece, alternating a figure-8 over the stirrup (outside the bridle block) and then thru the hole (bridle passage).  The idea was to make the binding for the stirrup sufficiently separate, so if it got a little loose, it would not make the prod loose.  Still the cinching up the sides tightened both prod and stirrup.  Was it any better?  Probably not. 
Also, I cinched up the sides of the bridle with separate cord... usually Tandy artificial sinew, with locked stitches that ran a cocks-comb right down the side of the bridle.  If you see that on a repro-crossbow it's almost certainly my work.  Nowadays, I bind in much closer to the way Jost von Ammen does it in the video.  Geezer.

Thanks for the link, that answered a whole bunch of questions

whats the oil he finishes with, any one speak German?

It's ordinary paraffin/wax: You put the paraffin/wax in a can, set the can in boiling water and heat. Just paint it on.  Geezer.