Ok, I brewed this last night with the following changes.
1.) My grain order came all combined in one big bag, so I couldn't separate the oats. Instead, I brought my water temp to 115 and steeped the whole bag for 15 minutes, then just left it all in there and brought the temp up to 155 for another 45 minutes.
2.) Used Amber extract instead of Light. Added half of the DME after the steep, then added the other half with the Lactose and Irish Moss. at the 15 minute boil point.
3.) Added bittering hops at 45 minutes instead of 60 and aroma hops at flameout.
My OG was 1.049, which I think is pretty good considering the partial boil mix. I'm still looking to hit the prescribed FG from the original recipe.
It is bubbling merrily away on my kitchen table this morning. My first ferment in glass and I'm enjoying the show!