Tesoro Vaquero - what coils are in your arsenal?

[digdug1968]

I bought a 5.75 inch concentric coil for my Vaquero a month or two ago, and I've been amazed at how it changed the machine's personality, so to speak. It's great in trashy parks and tot lots, and much easier to pinpoint with.

So my question is this, what other coils do you have for your Vaquero, other than the stock 9x8, and what do you use for what type of hunting? What do you feel are "must have" coils for the Vaquero???

I love the 5.75 concentric, and I won't part with it. I only use the 9x8 concentric when in wooded areas, or yards / areas with little trash, or where I'm looking for that tiny bit of extra depth.

I'm wondering what coil I need to buy next, so any input is appreciated.