Gecko 6 string spacing


I'm building a 6 string Gecko and was told the recommended string spacing is 16.5mm.  I was wondering if anyone has any experience or ideas whether it would be possible to use a 17 or 17.5mm spaced bridge on a Gecko 6. 
You could probably make a 17mm bridge work without too much trouble, but 17.5 would be pushing it.  At 17.5 you'd have to have square fret ends (aka "no bevel") and be very careful when setting up and playing to prevent the string from falling off the neck at the higher fret positions.
I just wanted to add that I ended up going with the 17mm hipshot A bridge and its a great fit.  Plenty of room on either side of the neck for the B and C strings.  I couldn't be happier.