[Version Control, Syncing only part of a BTSync folder]

Is there some way to implement version control with BTSync to preserve a public folder against vandalism? Also is it some how possible for multiple parties to hold only part of a massive BTSync folder? How would one go about implementing things like this?

[Wishlist (Archive)]

This is probably a dead horse but version control would be very useful for my friends and I.

My silly little macbook air SSD is too small to sync with many of my shared folders. If I could sync a designated part of each, my problems would be solved. Other benefits too ;-)

Actually, while I'm here does anyone know if there are any solutions to these issues at present?