Removable Presta Valves

I have been searching for a reliable source of mountain bike tubes with removable presta valves. Lace & I run tubeless on our personal mountain bikes but want to run stans sealant inside the tubes of our spare bikes (aka Guest/Skander's ride & Crapachino) and our Cross bikes. After much research I finally discovered that all Schwalbe tubes have removable valve cores. They are more expensive than your average discount bike brand tube... but appear to be much higher quality and regardless are worth the $ if it saves you having to constantly change flats or hassle with a tubeless setup. I picked up ten of these... Schwalbe SV13 (26x1.2-2.5). Read about them here... Schwalbe Tubes