The supplied 21mm plus 16.5mm extensions together with the 11mm T2 ring and the 6.5mm of the sensor to front of body natural internal spacing of the 294 cam gave the spacing the MPCC needed - it screws onto the last extension - using the ZWO supplied connector ring internal inner and outer threaded ring that fits inside the extension and screws around the MPCC male thread.
Thanks.
One less thing to go wrong
