[VHFcontesting] 2m and 6m Antenna Configuration

[KC4HW/Jim]

Hey Everyone, 

>From years gone past, I have two F9FT Tonna for 2m.  Unfortunately 
the plastic insulator for the driven element has gone away, but I have 
come up with a fix.  So I was thinking that I would put them in a 
horizontal (side by side) array.  

Any suggestions as to the right spacing between each of the 2m 
antennas?

I also have a 5 element 6m 18' boom homebrew courtesy of K4ZGB.

I was thinking that I might place the 2m array above the 6m antenna.  

What would be reasonable spacing between the 2m and 6m 
antennas?

All of this will go on a small tower (42').  I have about 10 to 11' of mast 
above the tower to work with.

Also, I wonder if it would be possible to do a vertical stack of the 2m 
antennas and place the 6m antenna in the middle between them?

Anybody got any thoughts?

Jim/KC4HW
EM71FB

BTW if there is another or two F9FT 2M Tonnas out there within a 125 
miles of Dothan Alabama, let me know the condition and your price.  
Honestly this is a low budget entry into the VHF world.  hi

Thanks!