When it comes to gadgets, making them at home is a great idea if you’re skilled enough, but these six examples show how not to do things — starting with the custom refrigerator above, which has no doors whatsoever. Continue reading to see them all.

[via TopCultured]

1. Chair Toilet

2. Box Cutter Razor

3. Motorcycle Headlight

4. Oven-Based Home Heater

5. Seesaw

6. Hot Tub Time Machine