Throkda -- I have used para cord tripled, so that the pole actually is hanging in six loops of paracord at each tri-pod by the time I fold the coil of cord over the lashings. It will need to hang @ 8" below the lashings to clear the legs so the starting loop of cord is @32" x3 + knot. The orange cord in the recent photos with my aluminum poles is pretty 5mm climbing accessory cord I scrounged from my husband's stash of rock climbing gear! (Sh! Husbands think we don't know about their secret stashes.) Be sure to take pics for us.
So far, after two nights of undisturbed sleep there seems to be no stretching of the aluminum at the joints or bowing of the legs in my two part poles.
Zukiguy-- Give that pool cleaning pole a try, but remember: hang no higher than you are willing to fall. I have really pushed my experimenting with various materials but sometimes I have stacked couch cushions under me for the trials. Watch for bowing. Confession time (sorry, no pics): with one extreme experiment using the usually dependable chain link fence top rail, I managed to bow and/or fold it to failure and took a fall that really surprised me. I was trying to place the tri-pods as close together as the slant of the hammock would allow. The rail and the hammock suspension attachment point extended beyond the tri-pod lashings/pole suspension loop by maybe 12". Lever arm + compression = OOOPS!
Bchboy-- My cure for that sliding on the ridgepole is a three wrap prussic. I settled on longish loops @20" of para cord to tie a three wrap prussic knot with a 1/2"diameter wooden dowel toggle attached with a larkshead. This allows me to adjust easily for various hammocks. That extra inch one way or the other can make big comfort differences.
Pedro: Love the chair idea. I may make one especially for my cat! She deserves a treat as she has been so good about being banned from my hammock.
Jsaults: That site you posted on the other bamboo tri-pods without a ridgepole thread about the MGS fiber glass poles was very interesting. They seem to encourage creative use of their products.
It might be instructional to give them a call to see what diameter pole they would recommend for our applications. The smaller diameter stuff seems fairly reasonably priced, but larger diameter is pretty pricey. If we could get a design ironed out and prototyped, we might be able to make a group buy that would be interesting. Their bundle cutting policy seems very cheap. I would love to go dumpster diving behind their facility!
It is fun to read of so many experiments with the tri-pods and to see where creative minds leap. Keep 'em coming!