I bought a Lie-Nielsen blade for my antique Stanley #4 USA a few years ago but always seemed to prefer using my Record 030 without really knowing why.
The other day I was trying to fettle the #4 because the shavings were clogging up in the mouth, something that never happened before. I first lapped the chipbreaker on the back surface so that it seated flush with blade, and then I stropped the front edge to allow shavings to flow over unhindered. This didn’t work.
I then tried moving the frog forwards and backwards-this didn’t work either. Too far forward & the plane mouth closed up, and too far backwards and I couldn’t adjust the blade downwards-the adjustment screw reached its limit.
There was only one thing left to do. I moved the chipbreaker further back along the blade, leaving a much larger gap. This seemed to work fine, even though I’ve read that the gap has to be much smaller. Maybe Stanley planes were not designed to take other blades?