I attached them using this crappy spool of made in India leather cord I bought a LONG time ago for crafts, so it works I think, only problem is it doesn't like staying tied all the time at least in a typical shoe lace knot. Oh well, to solve that I'm just gonna get a knee length gambeson and cut the cords on my braies to suit my waist length because the cords are ridiculously long and hang down to my knees if I don't tuck them in, not gonna cut them totally but they can use a trim. Wearing a tunic under my already tight gambeson would be a bit of a stretch, obviously I'm getting bigger and may soon need to buy a new one, not like I really like the one I already have as it's cotton and quite hot in the summer to wear. The funniest part was after I made my order the 13th century braies ended up going out of stock, I bought the last pair apparently.
Now I gotta figure out where to make my next purchase, could always go for turn shoes but I really DON'T like the soft feeling of medieval boots, the GDFB ones are good enough for me and probably more durable than them and feel more modern in the soles along with hobnails that make them less slippery than other stuff.