That is a rather large difference on compression test so hopefully it settles down soon. I’m assuming you did ensure that the ring gaps were not in line went the pistons went back in.
As for the breather, yes room is tight on a small bodied car which is why I got the young apprentice with slim arms and long fingers to change mine whilst on a ramp at a local garage 🙂
Here’s the homemade one that I replaced mine with, no baffle plate and 15mm unrestricted pipe up to the filter to stop dirt ingress. OK doesn’t look original but it’s down the side of the engine and saves the garage floor.
