HEHE I know this is an old post but i had to make a comment. hehe it was funny with what you said about it being clunky about the wonderbar.
I have the wonderbars on both my main guitars. I have been using them since they were first ever released. Myself I actually like the added weight. When i got the first one i ever owned i installed it on a Squire Bullet. Man it rocked!
Then after having problem with the bullet over the years, i reinstalled the wonderbar on an old yamaha guitar! i lost tone. but then again the orginal trem on it was a routed cavity so that had to be filled with a piece of wood flush for the wonderbar to mount on. OK that also helped to kill some of the tone. Then on top of that, the body of the yamaha was only plywood. so that also killed the tone. So it was a cross between everything.
Aside from the tone loss.. it still works like a charm on that old yamaha! of course i had added Carvin m22 pickups in it. which also helps.. it is a mean rocking guitar!
So because i been using them for years, i may be biased hehe To me i prefer the wonderbar over spring mounted trems. I never had any luck with them at all! Like floyds and them Strat styles.. I just never liked them springs on the back of the body!. they always went out of tune for me when i do extensive divebombing!! The wonderbar always held true for me!
The only thing I do have about the wonderbars is that the bar itself is kinda thin I like to see a more HEAVIER DUTY bar then the original stock thin ones. Maybe even make it shorter was well as heavy duty! Thats my only gripe about the wonderbars.
Wow, a Washburn Wonderbar. Man, I haven't seen one of those in years.......
...And I hope I don't see one, again, for many more years. Man, those things were clunky.