Topband: 2 Wire Directional Beverage

[fmoeves at twc.com]

I have a 585' single wire beverage more or less NE to SW.I put it up
two years ago as a test it worked great.Its in a heavily wooded area
with thick underbrush.I just cleared the trail so now would like to
add a second wire and make it directional.
I'm using Tractor Supply insulators it's the kind with the small wood
screw in the end.I'm using #14 THHN copper wire.
I'm going to make up Mikes (W0BTU) 1:1 reflection transformer.How
crucial is the spacing for the two wires?
Using Mikes spread sheet looks like 1.2'' spacing.Not sure if I did
this correctly or not?
I chose the following..10' height
.0641" conductor diamater
Thanks for any helpFred KB4QZH