Weber One Touch Gold vs. Weber One Touch Silver
Other than the ash catcher, is there any difference between the two models?
And, did you find the ash catcher enough of a upgrade for the $60 price difference?
If I got the Silver instead of the Gold, could I build my own type of ash catcher for the Silver?
I have experience with both the Gold and the Silver, and I'd recommend spending the extra bucks on the Gold. The ash bowl on the Silver is a real PITA to empty, especially if there's even the slightest breeze, whereas the Gold's ashcatcher is a cinch to empty, and much neater.
I've also had both the Gold and Silver, and I, too, recommend spending the extra money for the Gold.
Not only is the ash catcher on the Gold much easier to empty, but also it's much safer. On the Silver, some amount of live coals drop out of the kettle into the plate like ash catcher about a foot below. This is fine in calm winds. If it's breezy, the live coals can be blown away from the grill - potentially problematic if there's dry brush nearby. The ash catcher for the Gold is directly attached to the bottom of the kettle, so ash drops straight down into an essentially sealed container.
As to whether you could build your own ash catcher for the Silver - probably not, unless you have welding and metal-working skills.