How narrow can limbs be? (Important)

[Del the cat]

Del , the problem is, yours is a longbow, while my stave is only 55" long.
That really changes things up!

That should make it better!?? I think..
If it's shorter it will be stiffer than a longer bow, therefore it will need to be thinner to get the equivalent draw weight.
That means the ratio of thickness to width is less and it will be less likely to bend sideways. E.G it will be more rectangular and less square than a longer ELB.
Say the ELB is 4:3 width:thickness a shorter bow of same width is likely to be nearer 4:2 width:thickness
Del

[Knotty]

Is it backed? If it worked with Osage , it surely works with Guava.

[mikekeswick]

Firstly stop worrying! Don't stress on the string tracking lots of tricks to sort that out and more importantly just laying a string along a non bending stave doesn't actually tell you much....string tracking can only really be judged once it's braced. The simple answer then if it's off at all is to shape the handle to the string.
Do as Badger says