Hi   I'm embarking on detailing some Bachmann MK1s (TSO, BSK, RMBs etc)  that were used in the late 80s/early 90s, mostly in NSE livery (and for good measure I have a couple in Regional Railways livery). My understanding is that Bachmann released the MK1 as vacuum braked, however for my era all were dual braked and had ETH equipment. My question is... if thats right where do all the bits go!   If anyone has some helpful diagrams/photos of the underframe that'll be a great help.   On the We