[NTG-context] Figures protruding into the margin in double-sided document

I am composing a double-sided document with wide outer margins to allow space for figures. One type of figure is in-line with the text and protrudes into the wide margin. This is easy to do on left-hand pages by saying \setupfloats[location=right] and on right-hand pages by saying \setupfloats[location=left]. Is there any way to automate this so that inserting a new page does not mean I have to fix all the figures? I tried using a macro along the lines of \ifoff\pageno\\setupfloats[location=right]\else\\setupfloats[location=left]\fi but the asynchronousness of output routines means that the page number is usually wrong. Any help much appreciated. Tim