Kapton tape them in place & do both sides at once?
Its good to 500F.
Not to exceed temp during flow is 250C, 482F.
Guess question woul dbe hot to apply the tape without squeezing the solder paste out of place.
Perhaps pre-tin the bottom, then flux & tape the parts on while also placing the top side new?
Or get some of the glue that's used on the tape.