The mods will definitely be included if this goes ahead.
It is very tricky to get the seat tubes' alignment right. My frame was botched and it is hard to remove or insert the seatpost. If you are looking for a quick fold you may be disappointed.
It would be best for frames to be shipped directly to Peter and be on-shipped by him, because the shipping from China is costly.. However, the frames should be checked for integrity ; Peter would need to agree to this. I would try as much as possible to ensure alignment before shipping, by means of photos and even videos.