are they much more difficult to roll than j's? i roll j's all the time no problem but i was thinkin about tryin to roll a blunt for 420, any tips or instructions or links or anything would be appreciated. also, how much bud usually goes in a nice fat blunt, just out of curiousity, all my friends usually roll long skinny j's so i dunno, and do you always put a pure weed mix into the blunt or do you do it like tobacco w/ a spliff? thaknks