Fred, thanks for the info and the link, very informative. I was actually attempting to do what PeterT (in the link) doing. I have another HO motor I am using the brush cap from and will adapt it. Looks like I may need to use the armature also as the trolley armature has melted plastic all over it (the brush cap as severely melted around one brush. I am going to try to pop the brush holders out of the HO brush cap (I have already popped them from the trolley's) and see if I can put the brush holders from the trolley into the HO brush cap. This will keep the bizarre brush connections intact.