This is a general question but prompted by a specific example. I played this organ http://www.npor.org.....html?RI=A00714 in the City of London today. Old case positioned over the West door. Swell box (painted to match the wall and ceiling) can just be seen protruding above the case at the rear. The spec is a 35-stop 3-manual and pedal organ with apparently 6 independent 16' stops (I’m assuming the 32' has no pipes of its own although NPOR doesn’t say) in a case that’s not much larger than the 8-stop Norman & Beard tracker I grew up with. Access for tuning must be extremely precarious.
I remember seeing photos of the insides of 3- or 4-hundred-year-old European organs and marvelling at how compactly the pipes had been fitted onto the chests. I gather there can be problems if this isn’t done extremely carefully.
My question is: have internal designs changed in recent years for practical and Health & Safety reasons? Could a new organ be manufactured with the same space-saving as was used in older organs?