Karl,

Would you mind sharing your phone number so that we might communicate a little more efficiently?

Thanks,

Rick Ensor
cell: 541-973-9116

Hi Luke and Thanks Again for that, I think you poked the hornet's nest of Thought here! So this jig technique would be custom made for each Groove job, but could be re-used on identical TB's Not bad...

I'm no designer, but my spoiled nature ( well I like tools that spoil me, witness the Panavice Mod#301) would just dig a Jig that was universal/adjustable:woohoo:

But that is having the cake and eating it too, probably.

And i'm no Stand up comedian, though I am known in my day job for off the wall humorous banter w/ customers..stupid joke: "how many engineers does it take to change a light bulb? . . . . Answer: It doesn't matter, the Light bulb must Want to change!" I can use that ad-nauseum, 'cause guests are ever-changing. Warning: don't get in an elevator w/ me, I'm liable to pull anything out of thin air and say it...

Back to topic: Great Post, Great creativity, Luke!

TracyG Gadgetman Reno

HI Rick

You are absolutely correct: the differing angles of the throttle plate would change the distance that the scriber is positioned. That is why you have to find the plate angle first. For instance, if a different plate angle using the same jig made for a 16 deg plate is used, it may work without any modifications if the end result allows a cutting angle anywhere between 22.5 to 30 degrees. If it is beyond that, then you can modify the jig by either sanding the end down for steeper angles or adding thin cardboard to the end for shallower angles. That is why I set my jig for 26 deg, roughly the mid point.

And Tracy, I had in my mind a thin brass end, with a brass block in which the scribe is imbedded, on an adjustable threaded thumb wheel, inserted through a rosewood handle. I like my tools too, but that's a lot for just a line! I look at it, for me, as an aid to getting the range in the proper angle more concrete, so that when I have done over a 1000 like Ron, it comes naturally.

Take care,
Luke

Couldn't agree more, Luke! Practice improves technique. More the better, 'till a jig isnt needed anymore.
Again, we just need to follow the four rules...

TracyG Gadgetman Reno