4 Spd slight grinding when shifting.

I have to second the fluid can make all the difference comment.
ATF may be too thin to stop the gears from spinning before they try to engage.
When it gets hot it gets thinner, which goes along with worse when warm, so syncromesh fluid could very well fix the problem.

The attitude I'll stay out of, because as a general rule we don't talk to each other like that over an opinion offered. :-)