I recommend Tenax 7R as my styrene welder of choice. In fact I can’t recommend it highly enough. It dries very quickly, and bonds the styrene very hard.
Make your own eyebolts. I recently built my first sailing ship and threw away all the Revell eyebolts. I made my own from wire bent around a small brad, then C/A’d them into drilled holes on the deck. Let me tell you…they will not come out.
I will almost never use the alignment pegs slots on any model, as they are almost always off (particularly on airplane fuselages), but ships as well.
I will cut them off and use Tenax to get the seam correct.
We learn something on every model we build.