Many trailers today have an outside tap for LP. All I was saying was that to use this you have to remove the Weber regulator. I brought this up so that if he found this feasible he might want some information on parts.
I passed on using mine because of the expense of the kit and I use a 10#/2.5g tank and a hose. The difference for me is that the outlet on my Designer is toward the rear of the trailer and I would have to either have a very long hose or use a table. I like using mine near the bay, less effort to pack up.
As far as the small bottles go, when I use them on my 120 I have to use a lot of pressure to get the valve to open.