So, seeing as placement seemed a cinch. I decided to risk it and try to do it myself with the solder paste. I tried Eric's C-clamp technique on the middle lug. I had a hard time working around the clamp and getting the heat where it needed to be evenly, and eventually bumped the clamp off. The lug stayed put. I also couldn't really see what I was doing all that well and never really saw any solder "run" as they say.
On the front lug I used the suggestion to wire the lug in place. This worked very well.
Long story short, both lugs are in place, staying put with some taps from the small brass hammer with nylon face that I use for sight drifting and parts "coaxing" on modern guns. The pins lined up fine. The real test will be when I finally get to do some shooting again. If it holds, I will do the FdC.
Thanks for all the tips and encouragement folks.