I noticed recently that the current method for object chaining used with the brush tool has each object in the sequence effectively anchored to the line by its center point i.E. allowing for rotation ETC... enabling a lot of Xara's brush FX ETC... But this same scheme does not serve so well if the user wants the objects in the sequence to chainproperly.
(ie like railway carriages in that the ends of each object would not drift apart around corners)

This new chaining option could also have a parameter to allow (or not) for automatic variance in object size (within limits) so as the chain could better adhere to tighter corners.