I had to do a botched repair on a buffer on my MK III DVT/Control Car. Got me thinking about these very unique vehicles and the great skill and ingenuity of the Inchicore workforce in adapting them for service as push/pull trains. In his book 'Irish Railway Rambler', Michael McMahon observes that five of these were built as 'Driving Brake Generator Second Class', better known as Control Cars. They had full width cabs with underfloor Cummins generators for on-board train services. Also a novel idea to have power generated underneath the coach (akin to practice in the USA), then I got to thinking, imagine if they had converted more of them up to full speed standard to work with push/pull fitted 071s! It would have made for some interesting sights and sounds and cut out the need for running around at the likes of Hueston and Kent stations on the top link workings. Initally the push/pulls were probably underpowered with the single 121 (still a great idea and lovely comfortable trains), from the mid 90s they got superpower in the shape of the 201s. Has any of these wonderful vehicles been preserved?