With the large section of new flooring laid I set out to patch a floor air return that we no longer need.
A tip I knew about and used probably saved the job from having to be redone by someone with experience. I used a biscuit joiner to cut existing planks at locations I wanted to patch into. Here is a short video about the basic process from finehomebuilding.com:
After I made the cuts and removed the waste I added a new subfloor and now its ready for new planks.
Since discovering that the hardwood flooring was not continuous under the kitchen’s linoleum floor we planned to fix that by laying new hardwood to match the existing.