Yeah, i use to use Weed from high grade to really trashy rest-weed, leafes, and so on. If weed is grinded too fine, it also fills the tiny holes in the metal plate and if it gets hot, it goes to be sticky as hell and there you have your blockade.
Sure, the MP clogs faster causee there is the vapor, but after some time also the Screen on the bottom starts to give up.
What i have done so far:
I have drilled the holes in the MP a bit larger, and replaced the original screen-plate in the MP with a steel-screen.
And i also replaced the screenplate on the bottom with 2 steel screens...
The MP is also clogged really fast when weed is grinded too fine, so i made an "ball" out of an steel screen wich i can easily put on top of the weed before i put the MP on.
The round form of the ball makes is easier to remove it, i dont have to pod around with a needle or whatever. Just turn it upside down and the screen-ball rolls out.
To be honest, the original metal plates with the fine holes are nice to look, but they are horribe screens in my opinion.
Tip for removing the original screen in the MINI:
Take a needle with a long nose plier, and turn the mini upside down so you see in the airpath. you will see the 5 or 6 holes in the ceramic element, and some of those holes are accesible (use a light source to shine up in the oven, so you will see it better). Just push out the Screen with the needle til you can reach it with the pliers from the oven side.
Little to no force is needed this way, so you wont crash your ceramic element.