Firstly welcome to the forum. We hope to read more of your layout build progress
To note and importantly, Hornby do not make any Electrofrog points, all are Insulated frog. They are an identical match to Peco Setrack range (ST prefixed) which also has all its points available only as Insulated frog. Both Hornby and Peco Setrack automatically set the parallel track centres to 67mm and are fully interchangeable. Both use Code 100 rail profile.
Now comes Peco Streamline track sold in flexible lengths only and points sold in both Insulated frog and Electrofrog versions (SL or SL-E prefixed). These automatically space parallel track centres to 50mm So are much closer than Hornby or Peco Setrack. Streamline in OO is available in Code 100 and Code 75 rail profile. Finally on Streamline track none of these points are a direct drop in replacement for any Hornby or Peco Setrack points. Streamline is much larger overall even the small Streamline turnout is larger and the radius (angle) of the turnout is far shallower than any of the Hornby or Peco Setrack points
So like for like Hornby to Peco Setrack is fine but to Peco Streamline there are large difference. You need to be aware of this rather than spending money and find a point doesn't fit.
Finally, when using Electrofrog points my recommendation is to always fit two Insulated Rail Joiners (IRJs) to the ends of the points Vee rails. Then add new rail feeds of the correct polarity to the rails after the IRJs. While in some cases you can get away without fitting IRJs such as into dead end sidings I always fit them and add feeds, as if you don't fit and then alter the track plan later on you can easily end up with a short circuit and a lot of head scratching trying to locate the problem! All Electrofrog points (except the Electrofrog three way and Double Slip/Single Slip) can be used directly from the box.
Many Electrofrog users will enhance the points electrical performance by adding frog polarity switching, often via the point motors movement and a change-over switch (SPDT) fitted to the motor, that switch flips the frog and Vee rails polarity. Thereby removing the reliance of the moving switch rails making good contact to the closure rails when the two are closed together either way.
.
