So this heal toe you speak of

[Eclipsor]

IMO, the only time you should ever be looking at your tach is to judge your performance through a corner. If you know that, on a good run, you can take corner X in fourth gear at 5300 RPMs, then you'll know you improved a bit when you take that same corner in fourth at 5400. Rev matching is done by sound and feel, not looking at the tach.