I have two sets that came with my coach. They seem to work pretty well although as mentioned before there is some distortion but they are certainly still usable. I've been seriously considering getting a set of the double wides for the duals. I think they are actually by Camco but still very similar.
2005 Newmar Kountry Star gas 3742, Workhorse 8.1L w/Allison 5 speed.
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2005 Newmar Kountry Star Gas 3742
Workhorse W24, 8.1L/Allison 5-spd
JT, Em & the boys, Kong and George (rescued grey tabbies)