*Sigh* Didn't I used to be pretty good at this stuff? Man, what happened?
Well, I ended up using a touch n flow type bottle with Testors liquid. Only thing is, I tried to use the biggest diameter touch n flow tube I had, so I could drip a "pool" of cement into those wells in the hull, and then insert engines as per my plan. I ended up putting in too much cement and it overflowed onto the hull, down the side and dripping off the bottom. Damaged the paint pretty good and ruined that decal on the bottom. The good news is, it's fixable with a little airbrush time and another coat of Future. So I guess there's that.
All of our models must have one or two flaws, no? LOL