Pro Design cool head and Serval Cylinders

[dalegoldston]

I just swapped out to serval cylinders Do I need different "O" rings for my cool head. I have a leak on both sides around where the dome goes through the cool head. Was I just a dumb ass trying to use the old "O" rings or do I need different ones?

[Keno]

Same o-rings. If you are trying to use the domes from a stand bore cylinder, you'll need big bore domes with the Serval.

[dalegoldston]

Thanks, I purchased domes with the Serval.