There's no point if an off-the-peg rod does what you want, but before I moved down here two of my favourite kinds of fishing were after roach and bream on the Weaver and chub on a couple of little rivers. I wanted either short, soft rods or light wands of a sort you couldn't really buy, so I made my own. Tips with push-over sleeves, like on TriCast tip rods, are the only feasible diy way.
The end of the top sections look like this. The top one is from a rod I made on a TriCast fly blank. 10'. with two tops. A float top and a slightly shortened one to take a quiver tip. It's for chub on little rivers. The one below is an 8' 6" bitsa from a cheap composite leger rod and a float rod handle and has a sweet, soft action like a Sigma Wand. I fill the hollow tips with glue so they won't crush, and paint with PTFE so they won't grind.
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The tips all have push-over sleeves made from pole tip cut-offs. It's a bit fiddly to get the taper right for your rod end, and then you have to glue in your cannibalised quiver tip against the taper. But when you get it right-ish, it works better than clunky threaded rings and metal connectors. Plus - you made it yourself, and that's worth something.
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These rods have a couple of springtips (on stills/canals up to 15m you'll hit twice as many bites as on a quivertip) and a bunch of quivertips, and there are some angled rubber swingtips that I couldn't find when I took the pic.
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This stuff feels like it belongs to a previous fishing life, where 40 or 50 bites and an assortment of fish for 10lb meant you'd fished well. These days, the 10lb is likely to be one barbel or carp. I do miss the Weaver, even though I've got the Trent 5 mins away, and these miniature rods,