I have a Tx50/DS4 combo for my doubles. It doesn't freeflow to easily and I have never had a problem with the purge. The size is great, it vents on the side of my face instead of in front of it. They also breath better than the mk25/g250 combo I just bought. They are cheaper and its well known that they breath a little wet when your upside down. Thats easy to fix though. Work on your trim
Apeks are very nice regs for the money.
