Thanks, i am tempted to get the hammer out or repo saw again :shock: 😃
Mines a lot bigger than that and will have to go in diagonally with a tilt downwards.
Casing 6" dia would have to butt up close to the upright aircon pipe where the existing inlet pipe is.
The other problem is, so far i havent found any ducting that will enable tight enough bends in 80mm bore, i have the aluminium and the polyurethane so far.
Alum has a larger radius when bent but will collapse, the poly bends a bit tighter but wont collapse and might melt.