Lenz Silver Mini, Digitrax DZ125 or CT Elektronik are the only ones that will fit under the cab roof. CT Elektronik is the smallest but will have...
Comparison of Marklin to Peter Wright US and Euro version tie spacing details
Comparison of Marklin to Peter Wright US and Euro tie spacing details. PW turnout at top, MTL flex below, Märklin track and Märklin turnout at bottom
That's my Marlkin F7 with weathering and Ted La Mar's AZL GS-3
Final shot of Marklin conversion. Added a strip down the center of the frame and bits to suggest a brake system.