So to deal with the column to line and the reverse stuff for WWg. I think there are four main questions:
[1] WWg elements must move by pivots less than 90. So if the WWg is leading a column can it turn 90 and form a line?
[2] Likewise if a WWg is 2nd in an expanding column but there's no room to pivot. Does this prevent expansion by WWgs?
[3] For 2 WWgs in column. Does the lack of move distance prevent expansion: move 8 cm whilst distance required 8.9 cm?
[4] Contraction into column: do the same issues prevent this too?
I think we all know the answers but the column to line thing is a special part of the rules. What do you think?
I think a lot of this comes under whether the WWg is moving in a group move, IMO (and this came up in a discussion about expendables) the restriction for changes in direction (wheels or pivots {what ever the difference is, and no I am not going there again}) of up to 90 degrees is only for single elements moves rather than group moves.
In [1] I think yes the WWg can pivot the 90 degrees to form line from column.
[2] If it has the legs then yes a WWg second in a group can form line from column straight ahead but this is the tricky one as some would say that this is completed as if by single element moves, IMO it is still a group move.
[3] Yes I do not think that these two WWg can expand to the front for lack of distance.
[4] I think WWgs can contract into line, as this would be a group move
William
Sorry no faces something wrong with the reply box my end so am cutting and pasting.