Headed to Zion NP to do some backpacking in the Virgin Narrows and didn't want to lug a tripod around with me. Since there were two of us going (and 4 trekking poles), I figured I had enough poles for a last-minute tripod. Entire project done in the one hour before heading to the airport, including wandering the hardware store! I love living next door to Discount Builders!
2-6" Flexible Gas Conduit (about 3/4" in diameter)
2x 1/4-20x1" Hex Bolt
1/4-20 Long Nut
Metal Saw (Sawzall or hacksaw)
1/4-20 Tap/Drill Set
UPDATE: Just came across this design on the web
, looks to be a bit sturdier though maybe 10x the weight. Either way, another option!