I've no beef with people making whatever choice they want in regards to any sort of jigs. I want whoever's making something to be happy making it and get there however they want.
I'm not convinced that a jig like this actually helps your free-hand sawing, however. Perhaps a properly done study with a decent sample size could prove this one way or the other, however.
My initial instinct is that it's a bit like training wheels on a bike - you have to do two things to move forward on a bike; balance it, and pedal it to propel yourself. With a child just learning, the keeping the bike upright is a lot harder skill for them to master than the turning a crank. The real roughy is learning to do both at once.
A lot of times, you put a kid on a bike with training wheels, they learn to zoom around real fast, but they're really just learning how to pedal. That's not the hard skill to learn. They aren't using the training wheels as a "safety" from falling over, they're using them as a crutch, and when you get around to removing the trainers, it's like starting over. This leads to the idea of the pedal-less push bikes that you see more of for young kids now. (Although I would be tempted to just buy the kid an appropriate bike and remove the drive train while they're learning) Kids scoot around by pushing, but they're learning the balance skill, and they can catch themselves because they're not trying to combine it with the pedaling skill. Learning the harder skill first before trying to combine the two in such a manner that generates risk seems an easier approach.
And that's kind of how I see these saw guides sometimes - you've really removed the harder skill, the aligning, and keeping plumb, and such, and begin to focus on the easier skill, sawing back and forth. I'm not sure the jig itself really helps your muscle memory, unless you're taking a much more focused approach to practicing.
Maybe I'm just seeing it wrong, I don't know.
It also makes me think of sharpening jigs - I have some, I use them at times, but the sharpening jig didn't really make me better at freehand sharpening. It did help me realize what "really sharp" really was, but with joinery, I don't really need the help to visualize that.
Again though - that's just my rambling on these things and their benefit to free-hand skills; not their value to a person who decides that's how they want to use them.
Last edited by Jessica Pierce-LaRose; 05-21-2014 at 12:22 PM.
" Be willing to make mistakes in your basements, garages, apartments and palaces. I have made many. Your first attempts may be poor. They will not be futile. " - M.S. Bickford, Mouldings In Practice