Yes.
Unscrew the pins about a quarter turn. That'll allow just a bit of play and allow them to line up perfectly.
I rate my Mihec (MP Molds) the highest of any moulds EVER made. You will LOVE them once you get up to speed. Further, I lube my pins where they go through the blocks with Bullshop Sprueplate Lube.
FWIW
Dale53