We use tight line techniques all of the time for Montana fly fishing. The advantage of tight line nymphing is the strikes are quickly detected and the trout basically hook themselves. With a traditional dead drift trout often reject the fly so quickly that they are not hooked. The Czech method doesn't work as well on bigger waters since we can't always cast that close - I use more of the techniques pioneered by Joe Humphreys with tuck casts and then leading the flies down the river. When float fishing we often fish nymphs behind the boat at an aggressive angler and sometimes actually apply a downstream mend to impart just a bit of action and also to help detect strikes - deadly.