There is a certain amount of obsession over the weight of flamenco guitars, some think it helps get that flamenco sound and others like the feel.  I like a lightweight flamenco but never at the expense of wood quality or the required thickness of the different components.  What I will do sometimes when I am preparing necks, bridges, braces or anything else is put aside the lightest pieces for the flamencoes.  The difference is often very slight and I might even weigh some pieces with a kitchen scale to find the very lightest ones.   I don’t think it makes a big difference but if it gives the guitars a special something then why not?

A very important aspect of the comfort of a guitar, perhaps more so with a flamenco, is balance.  The weight of the neck and headstock can become very important to the player as it relates to the rest of the guitar.  Again, differences are not huge but guitarists can be very sensitive to slight variations.  Some builders try to find lightweight tuning machines and others prefer to use pegs.  A thread on this very subject at foroflamenco.com and the fact that I was recently preparing necks made it convenient for me to do a little experiment.  We know that a guitar with machine heads will be heavier than the same guitar with a peghead but by how much?  One member even suggested that the wood eliminated from the headstock on a machine head guitar balances out the added weight from the tuners (not so)  It was quite easy for me in the process of preparing a number of necks to weigh one just before drilling the holes and cutting the slots and then to weigh it again afterwards.  For the first weighing I drilled and reamed six peg holes which would later disappear when the slots were cut.  If I were to drill the six holes in their correct positions they would not all fall within the slots which I would later cut.   This gives us a good idea as to the difference between a peghead and a normal guitar although we should keep in mind that the wood used for the pegs can vary in weight, size of the pegs themselves is relevant, pegged headstocks are traditionally thinner than a normal head and so show even more difference in weight.  I tend to keep them the same thickness because is makes conversions easier for the poor fool who has to do it when the player decides that the pegs weren’t such a great idea after all.

The neck looks different in the two photos as one was taken with flash and the other without.  The neck with peg holes weighs 316 g and the slotted head weights 296 g

One possible solution to the balance problem is to install Pegheds as I have done on this guitar.  They give you the look of pegs, they are lightweight but have internal gears and are easy to use for those who panic when they see wooden pegs.  If machine heads are the only way to go for you you can try to find the lightest ones that fit your budget.  Here are a few that I had in the shop at the time

Sloane 151 g

of my testing.  The Sloanes are the old ones without the bearings which makes them a bit lighter although these are the longer model.  I was disappointed with the Gotohs as they are touted as being very lightweight.   I have never been impressed with the quality of Gotoh so I can’t imagine that these are any better.  I would imagine that the Rodgers will vary in weight with the different styles that they offer.  And what can I say about

Gotoh 154 g

the Schallers?  They continue to be squeaky but they tend to work well enough and not develop problems over time which is more than I can say for some.  For comparison I weighed the pegs also and the nice ebony ones shown above weigh 32 g for the set.  A set of 9mm Pegheds (2013) weighs 72 g so now we can make a decision about what to use.  The head with the Gotoh tuners shown will weigh 154+296=450.
The head with wooden pegs will

Schaller 139 g

weigh 32+316=348 and with pegheds it will weigh 72+316=388 so either way pegs make for a lighter headstock which will make a very lightly built guitar more balanced and therefore comfortable to play.

Rodgers 173 g