It's pretty much a non issue. All modern wood glues are stronger then the
wood, as is some not so modern ones so, from that point you would have to
hunt around for some glue that is weaker then the wood but strong enough to
withstand the forces it will encounter and I don't think fish or vegetable
glue will cut it.
To look at it in another way, unless you are talking balsa wood models, wood
it's self is pretty sturdy stuff and with properly made joints, if someone
is going too, in the course of normal use, bang it around badly enough to
break it either at the joint or the grain maybe it probably shouldn't have
been made of wood to start with or they shouldn't have been allowed near it.
Lastly, we aren't talking, say a crankshaft breaking under transmitted
stress we're talking wood that can be glued back up again.
I've had to repair glue joint failures and wood grain failures. I prefer the
wood grain failures, the wood goes back together easily and seamlessly where
as a failed glue line is usually a raggedy ass affair that always seem to
end up as an obvious repair.
In short, it's horse pucky.
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