Easiest way to rotate a LOT of stuff without breaking ShockEd

[6648936e07ec0RocketMan]

No easy way to say it.  I had a carefully thought out, ambitious architectural layout with angles and stuff.  I at least had the good sense to anticipate some problems with that so I figured I'd design modular segments in an orthogonal layout and then just area brush the whole thing and rotate by whatever angle.  Apparently, ShockEd really doesn't like this and won't even portalize.  I'm assuming this is some sort of precision or snapping bullshit.

Is there any practical way to have detailed architecture on an angle without spending a million hours placing every tidbit by hand or am I just fucked?