Im getting there guys slowly and thank-you for the replies...
After trying a few bike fit calculators online and getting different answers to the same question, curiosity was replaced with distrust.
I can't afford a bike fit so that's out. Feedback I have reviewed often reveals conflicting feedback. Couple this with a bike I don;t have yet...
As one responder mentioned earlier on in this thread. I do have my current bike and existing riding position. (This has taken me a year or so of tweaking to get just about right) Put together the existing geometry for the bike and I can quite accurately work stuff out. Just spending some time videoing myself riding in various positions also assisted in getting an understanding of the different riding positions I employ whilst riding. Initially confusing it ended up being very useful in understanding the whole "fit" question.
Add in scale 3:1 technical drawings that I spent some time making up of the existing bike and the proposed bikes and I think I am making progress.
It also pointed out one of the online calculators that seemed to churn out good data.
The one MAJOR
drawback...if i get it all wrong I can;t blame anyone else other than myself!
Thanks for the feedback folks.