My attempt at "continuous welded rail" in HO. Actually, I really don't like the look of rail joiners and since there is only a small amount of track here I can focus on the details. I plan to add styrene fishplates at a later date.
The "joint" for the two halves is clearly visible here. The blue ties will be replaced by copper ones for added strenght.
Just by luck, there isn't a turnout in sight at 3.5' thankfully.
Some more creative rail joints - all credit goes to Mears for the suggestion. I had to join code 100 and code 40 rail so I cut a code 40 rail joiner into four pieces and soldered the code 40 rail on top of the cut joiner to raise the rail head to the code 100 height.