For many this is going to be a no-brainer but since I struggled with it, I thought I would share and hopefully prevent someone else from wasting money on rail joiners. Use Micro Engineering Code 83 Joiners! They fit perfectly and are very small in size which will be nice for future picture taking. The Peco joiners are on the left and ME rail joiners are on the right:

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Here is a summary of rail joiners I tried and the results from worst to best:

  • Atlas - Too big and very loose fitting. Had to squeeze together with pliers first. I do not recommend even though they claim to be for code 83 track.
  • Walters - Small in length and height but do not fit at all. I do not recommend.
  • Peco - Fit well but they are similar in size to Atlas in terms of length and height. If ME rail joiners are not available, these are nice back up.
  • Micro-Engineering - Perfect.