IMHO, "bigger by 130%" means the final is 230%(=100%+130%). Xfbdev is NOT as Xorg-server, Xfbdev is a simplified version of a X server, so no fancy keboard/mouse/fonts etc dependencies...
Also, the "native" apps of TC are using FLTK as a GUI toolkit, so Xft.* will work just for few apps, but will not make "everything" bigger.
Plus is a long evolution about how font are scalable TTF (not bitmapped) and the implication of pango/cairo libs in font rendering.
Did you SAVE your new settings AND restart the TC (X server + user login)?
But, as long as you use gtk2 appls, fonts become scalabled, because new wonderful of GTK dependencies (and bloat/fat).