Personally I think that 'gritweed' is a load of bollocks.
Why takea plant with, lets say 3/4 oz of good bud and spray it with microscopic beads?
It'd only add a tenner on to the whole lot, at most cos it does'nt way fuck all, ad now you've got 3.1/4.1 oz of shit bud.
Sounds like prohibition bull...