RE: Other twin ARF?
Here's another option that I just came across..
[link=http://www.modelmaniacsonline.co.uk/products.php?CatID=7&SubCatID=247&ProductID=2738&Title=Ripmax+Harmony+Twin&ManCode=RHAR]Twin Arf[/link]
I don't know whether they are any good, or if anyone in the US is marketing them.
Walt