I'm pretty sure you don't know the former deployment of a few
O405s. Go read up SGWiki and SCRUTINIZE the DM CAC section and
you'll probably get a shock as to why some SLBP O405s are former
BNDEP buses.
let me see...i've gone to search:
SBS290E: 18 BNDEP
SBS291C: 18 BNDEP
SBS306U: 69 BNDEP
SBS316R: SP BNDEP
SBS320C: SP BNDEP
SBS410B: 69 BNDEP
SBS414R: SP BNDEP
SBS415M: SP BNDEP
SBS418E: 69 BNDEP
SBS419C: 69 BNDEP
SBS426G: 69 BNDEP
SBS427D: SP BNDEP
SBS433K: SP BNDEP
SBS450K: 18 BNDEP
SBS451H: SP BNDEP
SBS475P: SP BNDEP
SBS484M: 69 BNDEP
SBS485K: SP BNDEP
SBS492P: SP BNDEP
SBS494J: SP BNDEP
SBS495G: SP BNDEP
SBS496D: SP BNDEP
SBS541G: 19 BNDEP
SBS544Z: 69 BNDEP
SBS3779T: SP BNDEP, 293 BNDEP
SBS3780M: SP BNDEP
SBS3807X: SP BNDEP
SBS3821D: SP BNDEP
SBS3857B: SP BNDEP
SBS3892Z: SP BNDEP
this is all i hav from sgWiki. not sure if there is more. so
this tells that there is O405s in BNDEP in the past.