Garden Connect 4

We grabbed a couple of sheets of 600x900 mdf, 30mmx42mmx1200mm x 1 and 30mm x 18mm x 1200 x 3 pine.
one piece of 1200 x 30 x 8 tasmanian oak for the bottom swing piece.
Cut the 1200mm in half, so 2 end pieces and 6 internal channel pieces.
Using the 30mm as the spacing between the two sheets of MDF, we have 101mm approx gap between each vertical channel.
using a 70mm hole saw, the holes were cut centre 50mm in 50mm up from bottom left corner then 100 offsets for a total of 42 holes.
Th