Jeep Surge Tanks

[da9r00d]

has anyone seen or used the Jeep Surge Tanks from macsradiator.com

http://macsradiator.com/shop/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/d/u/duratekphotob_wt.gif

http://macsradiator.com/shop/surge-overflow-tanks/replacment-jeep-radiator-fill-tanks.html

http://www.lunghd.com/Tech_Articles/Cooling/Overheat_Diagnosis.htm

[LizardRunner]

I've never seen this brand. I have however driven many race cars that use custom aluminum tanks for both oil (drysump) and radiator surge. These look pretty nice and would be very servicable plus no worries about plastic breakdown. What are your concerns/ questions?