Thanks for your reply Jon Zerogee,
I'm pretty sure i don't have an MTSIII central station but it is not marked with anything so I just took a pic which is attached, so would welcome your knowledge in confirming what it is. Jon DunnyBahn is advising I go on the 'seeks 'part of this Forum to see if there is a preowned 55015p loco handset for sale so at least i can operate 2 locos simultaneously with my current system, which is sound advice. However, if I could upgrade to a Massoth the popular opinion reading various forums is that it's probably worth the expense in terms of the advantages it offers over LGB but i would be interested to know what you think, or should i give up on LGB MTS and go for a 'new' system compatible with my LGB locos and decoders? I put 'new' in inverted because i would never buy a new car but a preowned one of 2-3 years with reliable provenanc. I did read one forum this morning which stated Massoth is outdated and Zimo is the best, thus it's difficult to know what is my optimum option.
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best wishes,
Tim