[r-t] Minor principles

[Mark Davies]

PABS sent:

> 1320 Bastow Little Bob
> 48 Rapid Rap
> 36 z (Little Hybrid)
> 18 x (Differential Little Hybrid)
> 18 y (Little Hybrid)
> 59 com, atw

Eh - how does this work?

This looks as if it might be do-able, but really I'd prefer to have a
single, customised method to splice against RR to give a 720. A bit like LB
& Alliance, or Good & Evil. Is that not possible? Must be, surely.

MBD