I recently switched to shooting with a 4x5 and while I love the perspective and focus control possible with swings and tilts, I hate how heavy the gear is. This got me wondering if there would not be a way to simulate the effects of front and back tilt and swing in the darkroom, rather than the field. If I consider the plane of the negative to be the plane of the subject, then the plane of the lensboard in the enlarger would correspond to the front standard's plane and the plane of the easel to the rear standard's plane, right? In theory then, I could adjust the perspective and the focus by tilting the easel and the focus alone by adjusting the angle of the lensboard relative to the plane of the negative carrier. Has anyone tried anything like this? Does it work or am I completely off-base and overlooking something incredibly obvious? Thanks.