Boiler pressure can be adjusted check the forum for a previous post on this, or get a technician to do this.
I would suggest you buy a blind filter (they do not come in the box with the machine) from a Site Sponsor as they will have one that fits correctly.* Di Bella and a couple of others sell Musica.* *Or go back and see the person you purchased from and see if they will supply as they stated it was in the box when it was not.* In my case I purchased from a sponsor who provided a kit which contained the blind filter cleaning powder and a cloth.* So there are kits available which may supply want you are after
How long is your pour?* around 25-30 seconds would be correct.* If it is slower than this you may need to either grind courser or tamp lighter.* Only work with one variable.* If you have a set pattern to your tamping then adjust the grind.* I fill the portafilter then tap lightly on the counter then I fill again and level off and then tamp.* I find that this gets me a consistent result.* However everybody here has a different method, as as I previously stated if oyu have your own pattern then stick to it and adjust the grind as need be.
The noise you hear on startup is the boiler filling.* If you are not sure run the steam wand for a period (after the machine has heated) and you shoul hear the pump start up.*