Thanks again for all the encouragement and advice.
Last night I pulled two great doubles and an Americano. For the Americano for the Wife, I pulled the drip tray to let my Bodum Pavina tumbler fit under the portafilter and pulled twice to warm up the group and fill up the cup 2/3rds with water for the Americano. I followed this with the double into the same cup. I figured that this would be easier then separately heating water to add to the Americano, playing with the ventilator cap to try and force water out of the cap (by screwing the steam wand on the inside) or cleaning the group and then pulling the water afterwards. I didn't get any complaints.
This morning, I pulled a perfectly good 7g single. Good, not great, but definitely not a sink shot. I think the technique is slowly coming together and I also took some advice I found about really curtailing pre-infusion with a single which may have helped. I also leveled with the finger, nutated the grounds followed by a light tamp.
Now I'm getting calls for a cappuccino so I guess I'll have to get the ventilator and an apron out and get to work... cappuccino was enjoyed by the Wife and I followed that with a single espresso macchiato for myself since I had leftover frothed soy and no kids around to use it up on hot chocolate drinks... another good single, I'm stunned.
I've been looking at where the handle attaches to the portafilter. It looks like you could cut away 2/3rds to 3/4rs of the bottom of the portafilter and leave the handle attached, but the handle would face towards you blocking the view without a mirror. I'm starting to think I don't really need a naked portafilter at this time since I've got lots of practicing to do, but maybe if I'm feeling particularly flush I'll pick up a spare pf and look at chopping this one. The SSR is being shipped so my next project will be connecting up a PID to La Peppina which should make it more convenient to be able to leave it at temp between shots.
I'm loving this machine.