Originally Posted by cw5billwade
Just cut my HVAC in ceiling today with OSB/GG/DW blade did not get gummed up
Good to know, that takes care of the concern on gumming.
Here's my setup with the horizontal piece simulating the ceiling and the short stub piece simulating the wall (although reversed). I put a 3/8 shim to simulate the amount of curve in the actual ceiling.
After cutting through the simulated wall.....
2) Binding: The multi-tool could cut through it. The pressure however did make the cutting slow going. I was using a metal/wood blade so maybe a wood-only blade would work faster.
3) Spring back: The thin gap left by the multi-tool blade was immediately squeezed tightly shut by the vertical pressure.
So that confirms it. I can go ahead and use the multi-tool to cut the wall near the ceiling right? Well after doing this I realized just how blind I will be with what's going on behind the wall. I revisited some of my pre-drywall videos and there are both low and high voltage wires that are too close for comfort. I just can't risk cutting into those. I believe I'm officially in analysis paralysis hell. This isn't exactly an into-to-construction type of problem given my very limited construction experience