Sorry a little late to respond, yeah I ran both single taco pouches on an HSGI Costa Leg Rig, double tacos for a while, then soft taco on my chest rig.
The single taco pouches worked with. Getting the tension set right was critical. The doubles didn't work well for me though.
The soft taco once I got used to them I could run two mags in them and draw the mags one at a time.
If you've got more questions let me know.