What tooling or accessory do you find most useful on your Deckel ?

Me and Dan were discussing how useful the Index Attachment is, inside the For Sale forum. Since getting my Deckel I marvel at how they created the attachment to go onto the table, or the table mount...like most of the Deckel accessories, they are very well thought out.

I've heard in the past that the slotting head is very useful when you need it, but that it's not something you use all the time, and there are other broach solutions for when that is needed. Still, I love the idea of having the slotting head and would still like to get one someday.

The spiral attachment seems to be similar, in that if you had a specific task you needed to do, there would be no substitute. I've marvelled at the idea of using one to rifle a pistol barrel, but not sure how practical that would be.

What about the Center finder, that looks really handy (I know it's called something else, can't remember off the top of my head). I saw Bruce recently got one for his mill, that looks very useful.

Would like to hear from some of you Deckelheads out there in PM land, what is your favorite tooling and why/what have you used it for?

Here's one of the first things I did with mine. I used it to make a wrench key for the chuck on the attachment, for itself. :)