[r-t] Composition required please

[Richard Grimmett]

Fot a 720 of minor where you can change methods at any backstroke 
resetting the clock so to speak, and possibly the treble.

123456 Go Cambridge S
214365
124635
216453
261435 Cambridge S
624153
264513
625431
652413
etc.

To include Cambridge S, London S, Original. PB and LB are optional.

If someone can come up with a nice mix then challenge 2 would be to 
include grandsire doubles and stedman doubles with variable cover.

Thanks
Clarrie (who regularly rings touches like this for Sunday service).