Anybody ever tried it?
Technical spec: http://www.itapestore.com/technical_data/dual_lock/duallock_SJ4570_sj4575.pdf
And the regular stuff's spec: http://www.itapestore.com/technical_data/duallocksj355_.pdf
If I'm reading everything right, I believe mating this stuff with itself has about 75% of the holding power of 250-to-400 (and more than 250-to-250).
And the interesting part is that it's less than half as thick. 250-to-400 shows a mounted thickness of about 1/4", while the low profile stuff (on both sides) claims a mounted thickness of less than 1/10".
I've never seen any evidence that the extra thickness of Dual-Lock is a bad thing, but this stuff might be an interesting option to get a setup that is even more similar to mounting directly to the ski?