I have 5 Spectrum heavyweight passenger cars with horn hook couplers.  What coupler set do I order to replace them with the EZ Mate couplers?  Is it the same replacement coupler for all the heavyweight cars?

I looked at the instruction sheet, but can't tell how to remove the body shell to install a DCC decoder in a Spectrum Doodlebug.  Got a short description of the steps to remove the body shell (or roof section)?  I am planning on installing a DH123 decoder, will I need to cut the green wire?

I am making the change from DC to DCC.  Can the Bachman Plus F7's be converted to DCC?