Following sbs&tibs's stand...
200 K230 replace 200 MKII.
200 K230 replace 200 N113CRB.
Remaining 100 K230 replace 100 WA O405.
Replacements are needed for 100 WA O405, 300 DM O405 and 200 DM CAC
O405. So minimum needed is 600.
Following other's stand...
200 B9TL replace 200 MKII.
200 K230 replace 200 N113CRB
200 K230 replace 200 WA O405.
Remaining 100 K230 replace 100 DM O405.
Replacements are needed for 200 DM O405 and 200 DM CAC O405. So
minimum needed is 400.
Whatever it is, at least 400 buses are needed. Then like what
sbst275 said, buses are also needed for 10-min frequency ruling
that takes effect from don't know when... anyway if you calculate,
at least 500 more buses are needed.
Unless SBST introduce B9L as the next demo bus, if not highly
likely SBST would order at least 400 more B7RLE (and anyway this
demo is already very successful from the replies by other bus
fans).
Speaking of 8030L, do you guys think it should be allowed to do
other SLBP services instead of solely 174?