New Baby arrived last night, been playing with it ever since. I've frothed milk gloriously, and I've practiced my tamping pressure with scale and all. I have espresso leaking from the handle side of my portafilter. I've considered the manuals troubleshooting guide and I suppose it's possible I'm inserting the filter holder incorrectly, but it's lined up with the arrow. I hope the gasket/brewhead isn't dirty/worn 4 shots into it. and the rim of the filter holder is clean. Huge note, it only does this with the pressurized baskets. I thought about it and ran the commercial without a problem. Any suggestions?