Thanks for your input UFOsgalore, it does sound like it will be very helpful.
rryder, especially helpful to know that the add on kit also functions well. I can see where it would take some time and patience to create a chart to use for your threads but knowing where to start for a thread would really save some fuss.
Next is to track down a Canadian price
and see if it still seems worthwhile.
Terry in the ADK, I have not found any tiara related info for it but it does seem likely that it would work. hopefully someone else has it and can let you know.