no, except the first hits to make the hash soft so it will stir into smaller bits, I easily get dense vapor from hash now with my vvps. without it it wasn't as dense, but now I can really fog up my bong with hash.
hard to explain how much I put in. I measure it in chunks/pieces. that goes back to when I still combusted hash, I liked to smoke hash trough a puipe, wich I did by placing the screen high up in thw bowl so that it was visible while hitting, and taking a tiny piece of hash so that I could finish the piece in one hit. this because hash burns away very well while not hitting once it's lit, but with my method there was no waste-smoke, it was quick and easy, and I could get really high from a small amount of hash. since the only smoke was what I exhaled, I could also do it inside at places where there shouldn't be excessive smell, as long as I exhaled everything out of a window. nepal also was extra-good for this purpose since it's so soft you can easily pinch off a piece of the size you want.
well measured in those chunks, I now put in 4-5 chunks or so(without my vvps and bong I used to put less in), maybe a little more since I think the size of my chunks increased a bit since I last used that combustionmethod, back then I was limited by what was convenient to hold in one hit, now I lost that measurement