1. Remove the kiln sections.
2. Take the old bottom off the stand.
3. Put the new bottom on the stand.
4. Relevel the kiln.
5. Replace the kiln sections.
6. Ensure the stand is in good structural condition and free from corrosion before reassembling the kiln.

NOTE: You may want to experiment with using the old bottom as a secondary back-up bottom if it is not too severely damaged. Some find that having this extra insulation thickness helps firing times and bottom uniformity.