I not yet to print it, but i note that on cad data there are not the reference for a good alignment of pieces. Again the top of boat is enough to ensure that water does not enter?
assembled hull length 617mm
motors: 2212 1800...2200kv - 2 pieces
servo: SG90 - 1 piece ESC 30A - 2 pieces
stainless shaft 3mm: L=245mm - 2 pieces L=60mm - 2 pieces
coupling 3x3.175 - 2 pieces
teflon tube 6x3 as bearings