There seems to be a source of advice I alone have access to.
Errrr... the links on the home page :-)

Doug on pocket chain saws:
' the link or chain saw style. The original of the this style was the Pocket ChainSaw (formerly known as the Short Kutt Pocket ChainSaw) by Supreme Products. Until recently, it was the only one available. Now, another chain style saw has debuted, the Saber Cut from Ultimate Survival (Survival, Inc.).

Both these saws perform essentially as a human powered chain saw. It is absolutely amazing how fast you can cut decent sized wood with these saws. Easy enough so that you can easily use it for constructing more secure shelter than might otherwise be possible.' - DR

There's also his opinion on wire saws, folding saws, SAK saws.....

qjs