ORIGINAL: Bass1
[X(]Wow, Not a pretty picture at all! I found a few Hot Rocks on Ebay but none of the larger EZ Just handles. What is everyone using these days? Also I remember using 60 ft lines but I don't remember the gauge. I do remember buying a set of 60 foot lines that were too heavy when that's all the base hobby shop had in stock. What is the popular/best choice for .19 to .35 air frames?
Most use a closer spacing than the larger E-Z Just, more like the E-Z Just "Hot Rock". I still have a Hot Rock but it's about worn out. I like one designed by Tom Morris. It's inexpensive and adjustable. There are many types available. You might want to check some of the online hobby shops for what's available. Adjustable line spacing as well as length is a good thing.
AMA rules for stunt require .012 cables for .0801 to .25, and .015 for .2501 to .40 cu in displacement. I would not recommend solids as they are harder to maintain. BTW, other events such as speed, combat, and Navy carrier have different requirements. For sport/stunt the diameters shown are fine. I would suggest 52' length for the .19 and .60' for the .35. These are standard available lengths. Some can fly 60' with a .15 engine, depending on the plane.
You may want to peruse the AMA site for a lot of useful information such as line wrapping.
George