Product review (5 stars): great fit
Fit my Whirlaway 291 perfectly.  Center opening is smaller than original and strainer flaps stiffer so that water drains slower and food must be pushed through to grind.  Be careful when doing this, maybe use a wooden spoon to avoid injury.  I suspect with a bit of use the flaps will become less stiff and this issue may solve itself.  Otherwise an excellent replacement.