In reply to Beaky:
> I used a staple gun after i hammered the Tnuts in as some of the Tnuts popped out when I was taking holds on/off,
To get the best out of any T nuts, place them properly..
Drill a hole the exact size or slightly smaller than the T nut and slightly countersink the hole on the T nut side.
Draw the T nut into the wood to fix it with a bolt ( and hold or washer ).
If you hammer it in, its quicker but difficult to set dead square to the board.
If the hole is oversize, the prongs will distort the wood as they are not properly supported.