karma don't pack it too tight, if too much pressure builds it can blow out your filter. That's why some ppl use a steel filter and hose clamp. I use 2 brown coffee filters and the big thick rubber bands. ......... run 2-3 cans u have a good sized tube....... for the vac purge I bopugh a 3 pc set of vacuum seal canisters at sears and a mityvac brake bleeder (vacuum pump) at autozone. When you have ur errl on parchment paper (don't use wax paper) put t on a pan then throw it in the oven at 170 f. For 45 seconds, meanwhile have a pot of boiling water at 165-170f on the stove. Take ur pan from the oven, throw the parchment into ur medium sized vac canister, hook up the pump and start pumping. Use the boiling water to keep the errl molten. Pump till 22-24 hg. The higher the beter. Keep molten, the canister I have can take the heat of the water I hold it in for 30 secs take it out for a few mins over and over while I'm pumping. When at desired vacuum make it molten again on and off for 10 minutes. Then release vacuum, let it cool a bit then start over. It will stay molten for a few minutes after dunking so its pretty easy and not as much dunking as it sounds just keep it gooey. A vacuum at a higher temp is much much stronger.