Yes, Davydd, the ratios are about the same, but the numbers are much lower for the GW Legend SE. I can't remember the exact numbers, but I think we are at 30 fresh, 26 gray, and 10 gallons black. (It might be 26 fresh, 20 gray and 10 black, but I know the black is 10 because it's the one that usually causes us to go to the dump station.)
We would dearly love those numbers to all be higher as dumping is NOT our favorite thing about RVing (is it for anybody?). If I had the tank capacities that you have, I probably wouldn't fill the fresh before driving to keep the MPGs up. (That is unless I was traveling somewhere where I was dry camping.)
I'm envious about the size of your tanks.
Originally Posted by Davydd
The Wonder is a Class C, period. It looks like a classic Class C RV. It's big but then with the Murphy bed design which I noticed people always marveled at it at RV shows makes it an either/or RV. You are either staying up and living or going to bed sleeping. There is no both for two people as in zone living and sleeping. I would pass on that arrangement. However, there seems to be no reason for them not to come out with some of the other Unity based designs in time.
Clue me. The FGB tanks make no sense to me. The Wonder fresh water is 34 gallons, grey tank is 28 gallons and the black tank is a whopping 37 gallons. When I dump I usually balance out and need to add fresh water at the same time. My grey tank is always much fuller than my black tank which I always thought was a good thing because it flushed the hoses after dumping black. This just seems out of whack and has potential for weight overload if all three tanks are not taken care of around the same time. So, if they are then there is a waste of tank space. This is with a chassis that is 700 pounds less GVWR than a Sprinter van.
For comparison in what I am talking about my Advanced RV is 40 gallons fresh water, 26 gallons grey and 18 gallons black. That ratio is working out pretty well timing wise visiting a dump station. My former Great West Van and Pleasure-way had similar tank ratios.