I have to agree on the Lindsay sharpening templates. They are a stroke of genius. They only work with the 3/32 square tool bits, not with regular chisels nor traditional gravers.
I think TOF had special ordered a collet for 1/8 square tool bits from Lindsay.
The 1/8 ($3ea)bits are cheap, and the 3/32 come at a premium($10 ea). But if you are only going to use two or three, don't sweat the price.