Hello Panache I started this thread as a continuation from previous ones and I should have repeated the rules for the benefit of any newbies. Sorry, I will try to make amends!!! 
Just to clarify... you can basically have 1 or 2 'moves', the choice is yours, so if the last word is, for example, HEART...
you could add one letter and make, for example, THREAD
you could add two letters and make HEATHER
you could subtract one letter and make RATE
you could subtract two letters and make EAR
you could change one letter and make THEIR
you could change two letters and make HAZEL
you could change one letter and add one HEARSE or
you could change one letter and subtract one TRAP
I hope this makes sense, I'm feeling a tad confused now myself and I really hope I've got it right!
If any of the regular players don't agree or can explain it more clearly please feel free to correct me! 