PJ - I feel the pain on the resin stuff, mine is just as bad. Going to use the 4", and junk the rest. I hope his 20's are better in the 1/72 version, as I'll need 2 sets to get the three I need.
As to the PE you have in the fairwater, those are supposed to be "I" beams. From the pic it looks like you missed the inner part of the legs.
I gave up on the tower PE on mine, and it looks like it gets worse as you go up in the other two sections of it.
As soon as I get done with the Santa build, I have to get back to it.