Saves the effort of drilling holes and installing t nuts, plus there's no risk of spinning t nuts. If you're resetting a lot then you'll put more holes in the ply but personally I can't be bothered resetting that often.
Plywood has a 'correct' orientation and that's usually face grain parallel to the span. When you're using it for concrete shuttering it generally spans between horizontal rails, which themselves span between vertical 'soldiers' (i.e. 1-way spanning). With typical boards you've got noggins usually rather than rails, so personally, I'd be orientating it 'strongways' in the direction where the span is the greatest (i.e. C/C of the noggins vs. the C/C of your Vt aligned timbers). It's unlikely to be critical when building a home board but it will deflect less (again, I wouldn't want to have everything fixed dirty-euro with constant large deflections).
Terminology overload!!!
What's everyone's thoughts on symmetrical hold setup vs the spray wall? Considering the symmetrical setup for my woodie.
Who's that punter???