There are many decisions to be made when installing the floor. I decided to use one inch XPS insulation, and half inch plywood. I used the existing threaded areas, and riv-nuts to secure the floor.
Also to hold the sink/oven cabinet frame, and the drawer slide for the bicycles we used T-Nuts. In order to do this we needed to design far ahead. The T-nuts must be mounted under the floor. Its worth the time. Using T-Nut securely holds everything the the floor.
This video shows how important carboard is to the build, and how to create a simple tracing jig.
This video shows a unique use for pencils and putting in the riv-nuts.
T-Nuts: https://amzn.to/3wwjMIn
Drill bits
Of course you will need drill bits of all different sizes. Buying a full set of all the different sizes from Harbor Freight is good to have all the different sizes. But you will need quality bits in the common sizes. I have found Dewalt bits to be of good quality and last.
Drill Bits – https://amzn.to/3qdSRjg