Glad to hear there will be a third Buc!
what i have been doing for my leading edge seam joints is CA gluing a piece of 1/16” balsa strip or scrap airex( about 1/4 to 3/8” wide ) roughly 1/8” aft of the leading edge with it standing vertically. This creates a splooge “Dam”. Splooge is generously applied along the leading edge and up against the Dam prior to closing up the mold halves
this ends up being slightly heavier, but its near impossible to open up the LE seam.