I would like to use the SWCD's but I hear that they also have problems. This is probably due to not being cleaned often enough as well. The other issue is not being able to really control the output for a single line out put at a time takng full advantage of the pumps capability to push the full gph through one line at a time (picky I know). The new 1" inlet/outlets costs $85 each totaling $170, that would be the price to beat with a DIY unit I guess.
I called Evsco and the electric diverter valve pictured below is $503.00 list and the manual valve pictured below is $186 list; both are only available in 1/2" input/outputs and are rediculously priced!
The last picture is a manual 5 way diverter valve that has 1 1/2" slip inlet/outlets available from www.horizonparts.com for $48 list, manufactured by waterway but requires adding a motor to turn the valve.