My intention had originally been to purchase a full turnout kit. However, taking into due consideration various posts which refer to gauges and the set on the stock rail, I have decided that the best option would seem to be to get a kit of chairs and sleepers, code 75 rail and 00-sf gauges. I would then use a templot template to facilitate the build.
If that goes well I will buy the flextrack and further turnout parts to complete the extension to my layout. All my stock runs out of the box on code 75 as I have checked it on a piece of rail. I just don't want to finish up with track items which wont allow my stock to traverse them. My point about the cost is valid, so I have to ensure that any items purchased will fit seemlessly into my layout.