Multi-layer tintable creations?

Being an aspiring SL clothing designer I've been thinking about ways to make my offerings more appealing. One idea I've come up with would be to make a multi-layer tintable item using several layers on the AV (both the shirt and undershirt for example). By cleverly using alpha a customer could create a huge number of color combinations.

Are there any good examples of this approach out there? Pitfalls I should know about? Anything else?

I'm probably making my items copy, modify, no transfer for maximum flexibility on the customer's side. Does that sound sensible?

I've done it. The base on the bottom and then several different options for the upper layer for different styles. One top variation has a stripe, another one is more of a rainbow effect, and same for the pants. I think I did 3 different tops and 4 different bottoms. Or maybe it's 2 and 3...? I can't remember right now.

The only problem that I ran into was not being careful enough with the upper alpha and getting some bleed that I didn't want. Easy enough to fix once ferreted out. Trim it here, trim it there, good to go.

The main pitfall I've seen on tintable clothing is that you lose a lot of the details and highlights/shading when you change the colors (especially the darker tones).

But by all means, go for it! Sounds like you have a fun idea there

Best wishes on your new venture!
~Ari