What a mess - MM Cravens need to be bodged to fit kadee couplings. The longest NEM kadee is no 20 which does not work with MM Cravens unless modified.
While fitting Kadee couplings I discovered NEM 362 Pockets on some MM Craven are not NEM 362 standard length nor correctly positioned relative to buffers, but at least at the right height. (see pic below) .
The pockets on the IE/IR twin stripe livery Cravens are too long and not therefore NEM362 spec, as are the tension lock couplings supplied with these coaches (i.e. shaft is longer). .
But the CIE single stripe cravens have the correct length NEM362 pockets and supplied with tension lock couplings with appropriately shorter shafts. .
To fit Kadee no 20s to the IE/IR coaches the excessively long NEM pocket must be drilled on each side to create a recess for the end of the coupling shaft to click into (i.e. to stop them pulling out). This recess must also be such that the kadee is about 1mm proud of the end of the NEM pocket face or it will not reach the coupling on the next coach. .
To fit Kadee no 20s to the CIE single stripe cravens even though the no 20 fits the NEM pocket and snap fits, it is too far behind the buffers to couple up to next coach, so the pocket has to be drilled in the sides so the kadee no 20 is fitted about 1mm proud of the NEM pocket face.
Bizarre that the same coaches with only slightly different paint schemes have different NEM couplings. Why bother supplying rolling stock with NEM pockets unless they are the correct NEM 362 spec, the correct length, the correct position and the correct height. MM Cravens have gone from a perfect 10 out of 10 in my book to a mere 9 out of 10 because of this major annoyance.
How have others got around this inconsistent NEM 362 pocket problem? I know an option is to ignore the NEM pockets and glue or screw kadee gearboxe couplings like 146, or 148 direct to the coach body.