I'm looking for a strong, cheap, light-weight rear rack for my bike, mostly for getting groceries (which, depending on the time of the month, might be -a lot-).

Apologies, in advance: I'm sure that this has been discussed at length on this wonderful forum, which I've reaped many benefits from before, but here I am posting because it's really hard to Google an answer to this question:

I've got a recent aluminum Raleigh MTB (does it matter the model?), with disc brakes and factory "braze-on" bosses on the rear stays near the seat post, and also near the rear axle. What can bolt onto the frame that I have, without using the seat post and/or the rear axle, or foolhardly clamping onto some tubular section?

When Googling the subject, I mostly find people who don't have "braze-on" eyes. Which makes sense, but that's not a problem that I have.

In my research, it seems that a regular rack (whatever that is) won't clear the rear disc brake caliper. It also seems that both Topeak and Axiom have racks that accommodate the disc brakes, as do a number of other (both more expensive, and scary-looking) brands.

But, these all expect to bolt to the rear axle/stringer. And I don't want to do that, because it seems like a needlessly-complicated mechanical connection: Wheel/frame/rack seems ridiculously complicated compared to Wheel/frame and Rack/frame.

I mean really: Some racks attach to the axle and the seatpost, some racks attach to the axle and cantilever brake mount, some attach to the rear stays and whatever else they can grab with P-clips.... It's a lot like Taco-Bell: Three hundred combinations from only six ingredients.

Meh! I think I have a bike that is perfectly suited for a zero-sacrifice rack that can actually stand a solid load without breaking anything, using "braze-on" bolts at the top of the rear stays (which already exist), and nut+bolt at the bottom-rear bracket near the axle with existing holes (do these count as "braze-on" as well?), but not -using- the axle.

Perhaps a better, and more-simpler question is this: Amazon.com: Customer Reviews: Axiom DLX Streamliner Disc Cycle Rack, Black Does this rack do what I want? Must this Axiom rack mount to the axles, or can I nut-and-bolt (or tap-and-thread, to save a few grams -- which is not at my level of riding) it to the existing lower holes?

It already wraps around the disc brake caliper (to the rear). It already attaches to the "braze-in" bosses on my upper stays. (I keep putting "braze-in" in scare-quotes, because there is no brazing on aluminum....) And according to anyone I can find that has already used it and written about it, they simply use the rear axle -- always -- for the bottom half of the rack support.

I don't want to use the rear axle, though: I've got two pair of perfectly cromulent holes already in the rear bracket of my bike, and I want to mount it there if for no other reason than to save me a juggling act when I'm getting groceries, I've got a seriously flat tire, and everything is going wrong: As a practical matter, I want the rack to be a part of the bike frame, not a part of the wheel assembly.

So is anyone using the Axiom rear rack with disc brakes with other than the rear-axle as a support member? Are there any other budget-oriented, relatively-light racks that might do what I want (and I recognize that I'm asking a lot)?

Am I completely off-base? Barking up the wrong tree?

I just want to spend my money wisely, and get the strongest, most-frugal rear rack that I can to cart groceries with without hackery.