are positioned in a mid leg 256 position so the assemblies 262 and 264 are positioned below the lateral center of the single surface subsequently the inner support assemblies 262 and 264 which are slidably engaged on cross member 260 are positioned longitudinally below the self aligning keyhole recesses 285 and 286 in fig6 in the process of this longitudinal positioning of inner support assemblies 262 and 264 they automatically rotate 90 degrees via the same basic method as described for translation and rotation of arms 258 except modified for 90 degree rotation instead of 180 degrees next the arms 268 are retracted or extended to allow t pins 270 to align with the large end of the keyholes 285 and 286 then the single surface is lowered onto the current vertically oriented and locked t pins 270 via the frame top single surface interface arms 258 which mate in the large end of the keyholes 285 and 286 next the arms 268 retract to securely mount and support the single surface by the assemblies 262 and 264 at this point the articulation interlock module 152 could be easily removed or installed in the frameless single surface as described earlier finally the assemblies 262 and 264 raise the single surface off of the single surface to frame interface arms 258 and allow the cantilever reversal of arms 258 then the arm 258 and assemblies 262 and 264 engagement is reversed to return the single surface loading to arms 258 and allow the cantilever reversal completion via movement of the cross member 260 and its corresponding assemblies 262 and 264 to the end of the legs 256 in.