This weekend I assembled my ike tray and arms with the Oly PT-EP03 housing. For those that may be curious or in need of the information (I could not find it anywhere on the web), there are 3 1/4" thread holes on the bottom of the Oly housing. With the correct screws it is no problem to attach a standard ike double handle tray. Here are the parts you need: Hex Head 1/4 x 1" screw, 1/4" fender washer, 1/4" lock washer. Total cost 39 cents. You can use 2 or 3 of these.
The ike tray has a long slot so you can put the tray any position L-R that you like. I set the tray slightly offcenter so that I can fire the shutter without moving my hand off the right handle.