Being new(less than a year) into the aspect of PA, I've had an OCD about both lines being exactly the same. Left over from Combat.

With the resulting frustration in doing so, I have developed a system that guarantees lines exactly the same (+- less than 1/16) unless there is uneven stretching.
Measure the sleeve length that you are going to crimp (on 7 strand) Cut 2 single lines at the approximate length desired. Crimp as required. Some prefer looping over the crimp for the 3rd line, some others, inside the sleeve. I do it inside. Just preference.
Use whatever you wish to hold the set of lines together at the crimped ends. I use a very stiff welding rod stuck in the grass angled away from where I am SLIGHTLY pulling on the lines. At this time, I don't care if they have a few turns.
Hold the lines on your finger(s) and tug a little on them while sitting on the ground (grass,etc.) just to take the slack and any dissimilar tension.
This is important.
Cut both lines at the same time, while gently pulling close to the surface. Take up any slack again and make sure both lines are evenly cut.
Insert the sleeve in the line and with a thin marker, mark the length of the sleeve that you are using from the end of the line (5/16", 1/2", etc.)
At the mark, bend the line ~3/32" radius towards the sleeve. This will be your 3rd crimped line. It is exactly the same as your sleeve length.
Insert that line inside the sleeve. Loop the other end around the thimble while working the loop tighter.
Here is the best part. At the opposite end of the thimble (where the long line is) inset a paperclip through the 3rd line loop. THIS PREVENTS the loop from coming out the thimble end when we start pulling the line to tighten around the thimble. Crimp as usual. I do 3 crimps at 90deg from each other. Remove paper clip or similar from finished crimp. I use a 1/16" drill blank. Do the same for other line. If done with patience, we will have a set of lines within < 1/16"
Do the same for the other line. Having the same neutral on all planes is a very essential requirement for combat. Any plane that I have, can be flown on the same handle without an adjustment for neutral as I seldom change the line slider once I set the elevator for neutral. I know , I know. I can be classified as a Beginner Hacker in PA. I know now by experience, that different Stunt aircraft have different responses with the same handle. So the handle has to be adjusted to match the aircraft to the individual style. Never thought about it in depth but in makes all the sense. I am a strong believer now of having a different handle spacing for each plane unless they are the same or with the response being similar. A combat aircraft only differs in speed of turn and tightness; we are not concerned with repetitiveness

. We use the same handles for any of them. As everyone knows.

I hope that maybe this might solve some of those problems with equal line length for some. Just a different way. I have ~8-9 sets of combat lines in baby powder (haven't been used in several years) and they are all 60" +- 1/16. I can change any set with my combat handle and fly any combat aircraft. No line slider on those....

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For wrapped solids, Use 2 marks. One for the length of the wrap and one for the fold-over length. Tighten the sleeve before the 2nd wrap and twist.
