Well working things out based on the original 30x StreetDecks not taking into account the additional demo:

- 13x X31/X45/X46
- 9x X47/X70/X71
- 4x X5/X15
- 4x remaining (to cover X21/21 [PVR 27] and either directly provide spares or release older StreetDecks as spares)

With the total StreetDecks available including new batch now standing at 47, the following could be achieved with perhaps the 21 reduced to every 10 mins between CLS and Newcastle and the X5/X15 getting vehicles from elsewhere. Spares would also have to be sourced from elsewhere too:

- 13x X31/X45/X46
- 9x X47/X70/X71
- 12x for X21
- That would then leave 13x available for the 21 and a PVR of 13 would be achievable with a reduction of frequency between CLS and Newcastle

In terms of allocations based on route demands:
- 6341-52 for X21 (x12) *long route*
- 6353-61 for X47/X70/X71 (x9) *hills*
- 6301-6307 for 21 (x7)
- 6315-6321 for 21 (x6)
- 6321-6333 for X31/X45/X46 (x13)