Well Marlin, I don't want you to spend money needlessly as I know you spent a ton on the fuel distributor already... There are two possibilities that can go wrong in the event of hard starting.
First is the compensator valve.... on the top of fuel distributor... there is a hex nut or torx nut... where we have that 'hump' and it is along the line of it.
First, relieve the system pressure...then take off that nut... andI think there is a spring inside... then there is a tiny piston with a oring on it. To get the piston out... you need a small screwdriver to coax it out. Change that o-ring.
The other one is harder and more sensitive to do... but do the top one first and see what happens.