Does the KWC function correctly? One thing that put me off the WE models is weird hammer interactions (ie. the gun would only fire after racking the slide, rather than cocking the hammer). One of the reasons I loved the WA's so much was their 'realism' so to speak, in regards to hammer operation, firing at an angle without pissing away all their gas, etc..
I never made the leap to connect the Tsunami to it, must have moved away from WA by that point, still it's sad to hear, Gunsnguys was a great retailer too, but I'm guessing they're gone as well, considering their website times out nowadays.