There are a TON of Ultimates out there in every size.

Sorry that I'm not familiar with all the small bipes that're on the market. I've been out of RC for 15-20 years and only did a search on Ultimates when I first saw the problem with this linkage. But what I do know is that there is a set of "biplane linkage" available at both my LHSs. That'd suggest to me that some of the industry does understand what it needed to link uppers to lowers.

forestroke,
I guess it could be comforting to you that the WM Ultimate isn't the only mfg that's offering this somewhat flawed linkage, but truth is, I started the thread to give people a head's up so they might have a chance to decide for themselves after seeing what that linkage does and how to fix it very simply and easily. I thought I'd presented fairly clear pictures and explanation so that everyone could see fairly clearly what the deal is and I've offered the figures that're true for the linkage. When MinnFlyer suggested that Ultimates were made that way and everyone ought to take what's given, it wasn't exactly true about the a/c and I responded to that about all Ultimates. Truth is, I tried to offer information that might help people.

Hey, I've got a slogan I use at the field every time I get somebody's balky engine going, or sort out why their motor runs funny in flight, or help them fix damage: If you're not entirely satisfied, there will be no extra charge.

What I did, forestroke, is show you how to fix the problem with all those models so you can go ahead and buy any one that you like. And the fix doesn't require any extra hardware purchase. You can easily use the provided horns by modifying them. And I showed you clear drawings of what the problem is and how simple the fix is so that you can decide. And there is no extra charge for all that.......