Jo is right, you will see in most the design guides they use doubles. I had to use kermit for a butterfly for my relay operator but I found that I needed to wire every head, that takes time on a large design, but I must admit the effect was worth it.

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Rainbow

Quote of the day : To keep the heart unwrinkled, to be hopeful, kindly, cheerful, reverent that is to triumph over old age.
Amos Bronson Alcott