On my last couple of builds, I've been using Caenis fly-tying thread or ultra fine fishing line to tie my PE whenever possible instead of gluing.
I'm finding this to be very clean and neat in appearance with the added advantage of being able to flex and manipulate the parts once tied for perfect shape. You'll find that tying naturally pulls edges together in perfect mate and the objects often won't need to be filled. It's great for cranes and long box structures.
Often you'll only need a single knot to hold two sides of a crane or similar object together.
Another good example of where this is useful is a perfectly circular railing.
First shape it as usual. It doesn't have to be perfect.
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Tying the ends with caenis thread pulls them together. I usually use a surgeon's knot that has 3 or 4 turns for the first tie to help the initial overhand to bind to itself until I do the second overhand. You could touch this knot with a tiny amount of CA. The first half of the knot tends to want to slacken as you're doing the second. It's a small irritation that isn't impossible to deal with. Another possibility would be to tie the first half of the knot, secure one of the free ends to the table with tape, pulling the other end with your hand while the other hand secures it with a bit of CA.
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It is now easy to shape the circle so that it is perfect by whatever means necessary.
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Objects like this crane can easily done with 3 or even 2 knots. I build even the most complex cranes of any type only with knots. It's a lot more fun and easy. After it is painted, it is easy to fill the crack (if there is one) with white glue or even more paint. The nature of tying naturally pulls the structure together flush and evenly. After the structure is tied, again, it is easy to flex and shape the thing without a glue joint snapping.
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Certain mast structures like these drape-rigging pieces are easy to attach. They are flush across because they are tied. Gluing these are a pain and they never seem to sit flush...especially across a curved yardarm. Tying them naturally pulls them flush.
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There are so many opportunities to tie instead of gluing. It won't work for all things, but when there's an opportunity, it can work really well.