Moonboard T Nut Pattern Question

I'm looking at the T Nut pattern spacing from the DIY guide on the Moonboard website and am curious as to why the rows are slightly off-center left and right. It looks like row A is to start 20 cm from the left side of the plywood, and row K ends 24 cm from the right side of the plywood. Why would these not just be centered with 22 cm on each side? Doesn't make much difference, but just as to why that's he case. Appreciate the help!

AJG519wrote:

I'm looking at the T Nut pattern spacing from the DIY guide on the Moonboard website and am curious as to why the rows are slightly off-center left and right. It looks like row A is to start 20 cm from the left side of the plywood, and row K ends 24 cm from the right side of the plywood. Why would these not just be centered with 22 cm on each side? Doesn't make much difference, but just as to why that's he case. Appreciate the help!

So you can paint the row numbers on the bigger side. 

I never found a good reason for the off-center pattern except causing confusion when screwing the t-nuts in (I f-ed up one panel and had to remove them all flip the board and screw them in again so triple check before you commit!). My row numbers are in pencil and only needed them when putting the holds on the board. After that never look at them. Of course since moon was first, this is the 'standard' now so all the boards have this funky off-center pattern. But maybe I'm missing something critical this provides.

Thank you both. That makes sense - in that case, I think I'm just going to go ahead and center the grid.

Also to double confirm before I actually start drilling - the official moonboard is not on a perfect grid. Rows 6-->7 and 12-->13 are spaced 22cm apart instead of 20cm because that is where the grid crosses pieces of plywood. This is what the drilling pattern shows but just wanted to check again.

Thanks!

That's correct. The 2cm difference is almost negligible once you install the holds.