One of my earlier DMU conversions was a class 120. Built from Craftsman overlays on a Lima 117 it’s done many shows on Moor Street and was probably due a bit of an overhaul.
I had already rebuilt the underframe to better match the prototype and a few years ago I swapped the bogie side frames for Dapol ones* as they better matched the Swindon design the class ran on.
*the older ones from their trans pennine mode not the newer ones from their bubblecars
The big thing I wanted to address was the inner ends. When I built the model the inner ends were void of detail and the instructions just said to stick the Lima gangways and exhausts back on. However the class 120 exhausts are somewhat distinctive and look nothing like what Lima supplied. So the ends have been detailed up to better match the real thing.
As mentioned before I am a fan of the Masokits gangways for DMU’s however I don’t see a lot of point using them if they are hidden behind the exhausts. So for this model i have use paper bellows and moulded gangways I had in my spares box.