I can't help you with a type 3, but I've got them in my bug. I really hate them. They do look pretty cool, but they are a bear to set up. The previous owner hacked up my car pretty well to install these windows so I didn't have the ability to undo his work. There was no way to retro fit the vent windows back in.
I can tell you this... The snap in window scraper seals are the best ones for the job as they snap in the factory square holes in the door. The leading edge (where the vent windows used to be) need to be glued into place as there are no holes to snap into up there.
Make sure your regulators are up to the task. Take them out, degrease them, clean all the gook out of them, and then relube them. After that it's just hours of lining up and playing with adjustments to get them right.
Have fun!

Scott Faivre